EJE, vol. 97 (2000), issue 1
Egg size and hybrid syndrome-dependent embryo mortality in Chironomus hybrids (Diptera: Chironomidae)
Klaus HÄGELE, Monika KASPER-SONNENBERG
Eur. J. Entomol. 97 (1): 1-6, 2000 | 10.14411/eje.2000.001
Female hybrids of the cross Chironomus t. thummi female × Ch. t. piger male which are largely affected by the sterility inducing Rud syndrome were backcrossed with males of both parental strains. The aim of the study was to provide information about those egg volumes that are insufficient for a normal embryogenesis and to ascertain whether in the hybrids the lethally small egg size represents a new abnormal trait of the Rud syndrome. The egg masses obtained contain eggs of very different sizes with volumes ranging from 0.5 nl to 3.49 nl. Embryo mortality is unusually frequent in those eggs of the backcrosses and of the parental strains...
Allozyme polymorphism in isolated populations of the moth Coenophila subrosea (Lepidoptera: Noctuidae) from three Central European peat bogs
Jan ©ULA, Karel SPITZER
Eur. J. Entomol. 97 (1): 7-12, 2000 | 10.14411/eje.2000.002
Allozyme polymorphism was investigated in adult males of the stenotopic peat bog (tyrphobiontic) noctuid moth, Coenophila subrosea Stephens, from three isolated peat bog localities in Austria (Styria) and Czech Republic (South and North Bohemia). Of the eighteen enzyme loci examined, twelve were polymorphic and six monomorphic. Significant deviations of genotype frequencies from Hardy-Weinberg equilibrium were observed at about one third of polymorphic loci within the populations. The average heterozygosities for the populations from three geographically distinct localities ranged from 0.192 to 0.245, and 61% of the loci were polymorphic. The...
Insemination and fertilization in the seed bug Lygaeus simulans (Heteroptera: Lygaeidae)
Thomas MICHOLITSCH, Peter KRÜGEL, Günther PASS
Eur. J. Entomol. 97 (1): 13-18, 2000 | 10.14411/eje.2000.003
In the laboratory, not all females of the seed bug Lygaeus simulans Deckert, 1985, produced fertilized eggs after copulation: 26.7% of the females were not inseminated and 5% were inseminated but did not lay fertilized eggs; only in 40% of the couples did copulation result in fertile eggs. The remaining 28.3% of couples refrained from mating. Duration of copulation was associated with insemination and fertilization: (i) fertile eggs were produced by only one couple that copulated for less than 60 min and all those that copulated for more than 360 min, (ii) probability of fertilization increased steadily with duration of copulation between 60...
Photoperiodic control of the intensity of diapause and diapause development in the bean bug, Riptortus clavatus (Heteroptera: Alydidae)
Keiji NAKAMURA, Hideharu NUMATA
Eur. J. Entomol. 97 (1): 19-23, 2000 | 10.14411/eje.2000.004
Adult diapause in Riptortus clavatus (Thunberg) was induced by short-day photoperiods, and the critical daylength for its induction was 13.5 h. When insects were reared from eggs under diapause-inducing photoperiods near the critical daylength, the duration of diapause was shorter than when reared under the shorter daylengths. Adults terminated diapause under long-day photoperiods earlier when they had been raised under a near-critical photoperiod than under shorter daylengths; this indicated that the initial intensity of diapause was dependent on the length of the inducing photoperiod. Not only the photoperiods experienced during preimaginal...
Book Review: Distribution Maps of Quarantine Pests for Europe.
Eur. J. Entomol. 97 (1): 23, 2000 | 10.14411/eje.2000.005
CABI/EPPO: Distribution Maps of Quarantine Pests for Europe. CAB International, Wallingford, 1998, 768 pp.
Book Review: Forest and Insects.
Eur. J. Entomol. 97 (1): 24, 2000 | 10.14411/eje.2000.006
Watt A.D., Stork N.E. & Hunter M.D. (eds): Forest and Insects. Chapman & Hall, London etc., 1997, 406 pp.
Activation of gonads and disruption of imaginal diapause in the apple blossom weevil, Anthonomus pomorum (Coleoptera: Curculionidae), with juvenoids in laboratory and field trials
Jan ®ĎÁREK, Richard ČTVRTEČKA, Oldřich HOVORKA, Vladimír KO©«ÁL
Eur. J. Entomol. 97 (1): 25-31, 2000 | 10.14411/eje.2000.007
A possibility of using synthetic analogues of juvenile hormone (juvenoids) to disrupt imaginal diapause of the apple blossom weevil, Anthonomus pomorum females was demonstrated. Out of three preparations tested (methoprene, fenoxycarb and W-328) methoprene and fenoxycarb appeared to be effective. Sensitivity to juvenile hormone analogues develops early after imaginal emergence (even before the female starts to feed) and lasts throughout the whole aestivo-hibernation dormancy. Although the juvenoids could stimulate the onset of oogenesis at any time during diapause, the propensity of the ovaries to form normal eggs developed only during hibernation...
Book Review: The Insects. Structure and Function.
Eur. J. Entomol. 97 (1): 32, 2000 | 10.14411/eje.2000.008
Chapman R.F.: The Insects. Structure and Function. 4th ed. Cambridge University Press, Cambridge, UK, 1998, xviii + 770 pp.
Exploration and assessment of the oviposition substrate by the cabbage root fly, Delia radicum (Diptera: Anthomyiidae)
Vladimír KO©«ÁL, Robert BAUR, Erich STÄDLER
Eur. J. Entomol. 97 (1): 33-40, 2000 | 10.14411/eje.2000.009
Oviposition behaviour of Delia radicum is not only influenced by host plant duality but also by the duality of the substrate in which the plant grows. Direct behavioural observations showed that the females partition their visits to a host plant (cauliflower) into ovipositional bouts separated by exploration of the host plant surface. Ovipositional bouts were further partitioned into acts of egg deposition separated by exploration of the substrate. While the mean number of ovipositional bouts per visit (2.6), and eggs laid per egg deposition event (1.4) were stable, the mean number of egg deposition events per ovipositional bout significantly...
Jumping technique and climbing behaviour of the collembolan Ceratophysella sigillata (Collembola: Hypogastruridae)
Jörg ZETTEL, Ursula ZETTEL, Beatrice EGGER
Eur. J. Entomol. 97 (1): 41-45, 2000 | 10.14411/eje.2000.010
Ceratophysella sigillata uses protrusible vesicles on its antennae and posterior end as sticky landing devices to avoid tumbling upon landing. This technique facilitates its orientated movement during winter migration. It allows the animal to use directional jumps without rebounding even when climbing tree trunks. The antennal vesicles are present only in the surface active morphs of C. sigillata, and only these individuals jump readily. The vesicles are everted only when the animal has time to prepare the jump. In an escape leap, they are not protruded and therefore the animal tumbles upon landing.
Book Review: Functional Morphology of the Head-Arrester System in Odonata.
Eur. J. Entomol. 97 (1): 46, 2000 | 10.14411/eje.2000.011
Gorb S.: Functional Morphology of the Head-Arrester System in Odonata. Zoologica, Original Abhandlungen aus dem Gesamtgebiet der Zoologie 148. E. Schweitzerbart'sche Veralbuchhandlung (Nägele u. Obermiller), Stuttgart, 1998, iv + 132 pp.
Webs, diet, and fecundity of Theridion impressum (Araneae: Theridiidae)
Eur. J. Entomol. 97 (1): 47-50, 2000 | 10.14411/eje.2000.012
Data on the webs, prey spectrum, density and fecundity of Theridion impressum from three different habitats [fields of sunflower, fiddleneck (Phacelia), and apple trees] are presented and discussed. The volume of webs were found to vary between 5 (the first free instar) to 117 cm3 (subadult and adult specimens). The mean density of adult spiders per plant was 0.7 (sunflower), 1.5 (fiddleneck) and 1.2 (per apple branch). Spiders preferred to build webs in the upper part of vegetation or at the extremities of tree branches. The prey spectrum was assessed by collecting webs and identifying their contents. Prey items were primarily...
Species of the genus Folsomia (Collembola: Isotomidae) of northern Asia
Mikchail B. POTAPOV, Anatoly B. BABENKO
Eur. J. Entomol. 97 (1): 51-74, 2000 | 10.14411/eje.2000.013
This paper deals with the taxonomy and distribution of Folsomia species from northern Russia with special reference to the Asian regions. Eight new species are described: F. amplissima sp. n., F. ancestor sp, n., F. atropolaris sp. n., F. borealis sp. n., F. brevisensilla sp. n., F. cryptophila sp. n., F. longidens sp. n., F. palaearctica sp. n. Five species, F. taimyrica, F. regularis, F. sp. aff. altamontana, F. alpha, and F. janstachi (nom. n. for Isotomina gracilis Stach, 1962 nec Folsomia gracilis Latzel, 1922), are redescribed....
Book Review: A Checklist of Irish Aquatic Insects.
Eur. J. Entomol. 97 (1): 74, 2000 | 10.14411/eje.2000.014
Ashe P., O'Connor J.P. & Murray D.A.: A Checklist of Irish Aquatic Insects. Occasional Publication of the Irish Biogeographical Society 3. Irish Biogeographical Society, Dublin, 1998, vi + 80 pp.
Revision of the genus Mimesthes (Coleoptera: Meloidae: Mylabrini)
Marco A. BOLOGNA
Eur. J. Entomol. 97 (1): 75-84, 2000 | 10.14411/eje.2000.015
The species of the mylabrine genus Mimesthes are revised and a new species (M. karooensis) is described from the South African Karoo. The systematic position of the genus is also discussed and an identification key to the species is proposed. Geographical distribution and habitat preferences, as well as other bionomic features, are summarised.
Separation of Aspidiotes species using morphometric analysis (Coleoptera: Curculionidae)
Manuel SÁNCHEZ-RUIZ, Isabel SANMARTÍN
Eur. J. Entomol. 97 (1): 85-94, 2000 | 10.14411/eje.2000.016
The efficacy of morphometric characters for separating the species of the genus Aspidiotes Schoenherr, 1847, was evaluated. Thirty characters were analyzed. Multivariate and univariate analyses of variance, and discriminant function analysis, all dem onstrated that each species is morphometrically distinguishable. The lengths of rostrum, scape, onychium, pronotum, and width and length of elytra have the maximum discriminatory power. Males and females are also morphometrically distinguishable, mainly due to differences in the widths of rostrum between pterigia and at base of pronotum, and width and length of elytra. The classification functions...
Phylogenetic relationships among social parasites and their hosts in the ant tribe Tetramoriini (Hymenoptera: Formicidae)
Mathias SANETRA, Alfred BUSCHINGER
Eur. J. Entomol. 97 (1): 95-117, 2000 | 10.14411/eje.2000.017
The phylogenetic relationships among Palaearctic species of the ant genus Tetramorium and its social parasites of the genera Strongylognathtus, Anergates and Teletomyrmex, were investigated electrophoretically at 21 presumptive enzyme loci. The data set comprising 33 species was analysed with distance (UPGMA, Neighbor-joining and least squares statistics) and parsimony methods (independent allele, minimum turnover and mutation coding) in order to rule out analysis-dependent effects. Several groupings were consistently resolved by all procedures. Observed branching patterns support the placement of the three parasite genera...
BOOK REVIEW: Cox M.L. (ed.): Advances in Chrysomelidae Biology 1.
J. BEZDĚK, A. BEZDĚK
Eur. J. Entomol. 97 (1): 118, 2000 | 10.14411/eje.2000.018
Backhuys Publishers, Leiden, 1999, 672 pp., 332 figs, 73 tables.
Review of the Afrotropical subgenus Disneyempis (Diptera: Empididae)
Eur. J. Entomol. 97 (1): 119-129, 2000 | 10.14411/eje.2000.019
The Afrotropical subgenus Disneyempis Smith of the genus Empis L. is redescribed and redefined on the basis of three synapomorphies, namely labrum lengthened, male eyes more or less broadly separated on frons with all ommatidia of equal size, female abdomen with bluish to purplish metallic reflections on terga 2-5. At present, the subgenus comprises six species: E. (D.) hirsutipennis Smith as type species, E. (D.) jacksoni Smith, E. (D.) argentea sp, n., E. (D.) spinifemorata sp. n., E. (D.) proboprocera sp. n. and one unnamed species...
Book Review: Fruit Fly Expert Identification System and Systematic Information Database. Myia, Vol 9.
Eur. J. Entomol. 97 (1): 129, 2000 | 10.14411/eje.2000.020
Thompson F.C. (ed.): Fruit Fly Expert Identification System and Systematic Information Database. Myia, Vol 9, North American Dipterists' Society. Backhuys Publishers, Leiden, 1998, 524 pp.
Book Review: Family-Group Names in Diptera and Bibliography. Myia, Vol. 10.
Eur. J. Entomol. 97 (1): 130, 2000 | 10.14411/eje.2000.021
Sabrosky W.C.: Family-Group Names in Diptera and Bibliography. Myia, Vol. 10, North American Dipterists' Society. Backhuys Publishers, Leiden, 1999, 584 pp.
Description of the immature stages of Syritta flaviventris (Diptera: Syrphidae) and new data about the life history of European species of Syritta on Opuntia maxima
Celeste PÉREZ-BAÑÓN, M. Angeles MARCOS-GARCÍA
Eur. J. Entomol. 97 (1): 131-136, 2000 | 10.14411/eje.2000.022
Adults of Syritta flaviventris and S. pipens were reared from larvae collected on decaying platyclades of Opuntia maxima Miller (Cactaceae) from the Spanish Mediterranean coast. The larva and puparium of S. flaviventris, as well as preliminary data about its life cycle are described. The feeding behaviour of the larva in relation to the cephalopharyngeal skeleton morphology is analysed. Based on the present data, a comparative table containing the main morphological characteristics of the immature stages of European species of the genus Syritta is presented.
The guarding posture of females in the subsocial bug Elasmucha dorsalis (Heteroptera: Acanthosomatidae)
Eur. J. Entomol. 97 (1): 137-139, 2000 | 10.14411/eje.2000.023
The subsocial bug Elasmucha dorsalis lays egg masses on the underside of the leaves of female plants of Aruncus dioicus. Each bug straddles her eggs and shields her offspring with her body, until they moult to the 2nd instar. Females that: attended aggregations of 2nd and later instar nymphs feeding on fruit of inflorescences often settled close to the basal part of or just below the aggregation, and faced towards the base of the inflorescence. The nymphal aggregations often Seemed to be too large for females to guard effectively. The position and orientation of females attending 2nd or later instar nymphs probably enabled them to detect...
Book Review: Gelechiidae I (Gelechiinae: Teleiodini, Gelechiini).
Eur. J. Entomol. 97 (1): 139, 2000 | 10.14411/eje.2000.024
Huemer P. & Karsholt O.: Gelechiidae I (Gelechiinae: Teleiodini, Gelechiini). In Huemer P., Karsholt O. & Lyneborg L. (eds): Microlepidoptera of Europe. Vol. 3. Apollo Books, Stenstrup, 1999, 356 pp.
Book Review: Atlas des Genitalia Mâles des Lépidoptères Tortricidae de France et Belgique.
Eur. J. Entomol. 97 (1): 140, 2000 | 10.14411/eje.2000.025
Chambon J.-P.: Atlas des Genitalia Mâles des Lépidoptères Tortricidae de France et Belgique. INRA, Paris, 1999, 400 pp. (in French).