EJE, vol. 98 (2001), issue 4

Physiology of heartbeat reversal in diapausing pupae of the tobacco hornworm, Manduca sexta (Lepidoptera: Sphingidae)

Karel SLÁMA, Thomas A. MILLER

Eur. J. Entomol. 98 (4): 415-431, 2001 | DOI: 10.14411/eje.2001.061

Pulsations of dorsal vessel were monitored by the noninvasive techniques of contact thermography on the dorsal cuticle and by strain gauge detection of abdominal elongation movements. Diapausing pupae exhibited periods of forward-oriented, or anterograde pulsations (average duration of each pulsation 5-8 min, frequency of individual systolic strokes 10-15 per min) alternating with somewhat slower, backward-oriented or retrograde cardiac pulsations (average duration of each pulsation 6-10 min, frequency of systolic strokes 7-12 per min). The highest rate of hemolymph flow was associated with the anterograde pulsations. We studied cardiac functions in...

BOOK REVIEW: Larson D.J., Alarie Y. & Roughley R.E.: Predaceous Diving Beetles (Coleoptera: Dytiscidae) of the Nearctic Region, with Emphasis on the Fauna of Canada and Alaska.


Eur. J. Entomol. 98 (4): 432, 2001 | DOI: 10.14411/eje.2001.062

NRC Research Press, Ottawa, Ontario, Canada, 2000, 982 pp. incl. 236 plates and 274 distributional maps.

Diel changes in adipokinetic response and walking activity of Pyrrhocoris apterus (Heteroptera) in relation to physiological status and wing dimorphism

Anna MAXOVÁ, Dalibor KODRÍK, Rostislav ZEMEK, Radomír SOCHA

Eur. J. Entomol. 98 (4): 433-438, 2001 | DOI: 10.14411/eje.2001.063

Three experimental groups of adult females of Pyrrhocoris apterus (reproductive brachypterous, diapausing brachypterous, and macropterous with non-diapause type of reproductive arrest) were analysed for their dose dependency of adipokinetic response, sensitivity of the fat body to Pya-AKH and locomotor activity during a 24 hour cycle. The greatest adipokinetic response (lipid elevation after hormonal treatment) was observed in macropterous, lower in diapausing brachypterous and the lowest in reproductive brachypterous females. Macropterous females also exhibited the highest activity of walking, while the lowest locomotor activity was found in...

Comparative dispersal and larvicidal activity of exotic and Azorean isolates of entomopathogenic nematodes against Popillia japonica (Coleoptera: Scarabaeidae)

Lawrence A. LACEY, J. Silvino ROSA, Nelson O. SIMOES, Joao J. AMARAL, Harry K. KAYA

Eur. J. Entomol. 98 (4): 439-444, 2001 | DOI: 10.14411/eje.2001.064

The Japanese beetle, Popillia japonica Newman, is an introduced pest on Terceira, one of nine islands in the Azorean Archipelago. Research conducted on Terceira indicates that entomopathogenic nematodes in the families Steinernematidae and Heterorhabditidae provide good to excellent control of Japanese beetle larvae, but the species that have been evaluated are not native to the Azores. An efficacious species that is native to the archipelago might provide increased capabilities for persisting and recycling in Azorean soil and weather conditions. Surveys on the islands of Terceira and Santa Maria resulted in the isolation of two Heterorhabditis...

Dermaptera hindwing structure and folding: New evidence for familial, ordinal and superordinal relationships within Neoptera (Insecta)


Eur. J. Entomol. 98 (4): 445-509, 2001 | DOI: 10.14411/eje.2001.065

The Dermaptera are a small order of insects, marked by reduced forewings, hindwings with a unique and complicated folding pattern, and by pincer-like cerci. Hindwing characters of 25 extant dermapteran species are documented. The highly derived hindwing venation and articulation is accurately homologized with the other pterygote orders for the first time. The hindwing base of Dermaptera contains phylogenetically informative characters. They are compared with their homologues in fossil dermapteran ancestors, and in Plecoptera, Orthoptera (Caelifera), Dictyoptera (Mantodea, Blattodea, Isoptera), Fulgoromorpha and Megaloptera. A fully homologized character...

Revision of Afrocrania (Coleoptera: Chrysomelidae, Galerucinae) Part I: Species in which the males have head cavities or extended elytral extrusions


Eur. J. Entomol. 98 (4): 511-532, 2001 | DOI: 10.14411/eje.2001.066

Material of Afrotropical Afrocrania Hincks, 1949 (= Pseudocrania Weise, 1892, not Pseudocrania M'Coy, 1851) is revised, and a redescription of the genus is given. This publication is on Afrocrania species in which males have head cavities or extended elytral extrusions. Species without those sexual dimorphic organs will be revised in a subsequent paper. Material of Pseudocrania latifrons Weise, 1892, Pseudocrania foveolata (Karsch, 1882) (= Monolepta africana Jacoby, 1894, = Pseudocrania nigricornis Weise, 1895), and Pseudocrania assimilis Weise, 1903 was examined; Pseudocrania...

A review of the species of the reduviid genus Tiarodes (Heteroptera: Reduviidae: Reduviinae) from China

Wanzhi CAI, Lu SUN, Masaaki TOMOKUNI

Eur. J. Entomol. 98 (4): 533-542, 2001 | DOI: 10.14411/eje.2001.067

The species of the genus Tiarodes Burmeister from China are reviewed. Three species are recognized, described or redescribed, illustrated and keyed. T. venenatus Cai et Sun and T. pictus Cai et Tomokuni are described as new species. The T. versicolor (Laporte) previously reported from China by Hua is in fact T. salvazai Miller.

Diagnostic characters of the larvae of some Hoplothrips species (Thysanoptera: Tubulifera) in Norway

Sverre KOBRO, Trond RAFOSS

Eur. J. Entomol. 98 (4): 543-546, 2001 | DOI: 10.14411/eje.2001.068

Characteristics of 46 setae of the second stage larvae of four Hoplothrips species (Thysanoptera) are discussed with respect to their diagnostic value. Two different approaches, of which one is mathematical, for identification of the larvae are given.

Parameters of reproductive activity in females of Harmonia axyridis (Coleoptera: Coccinellidae)


Eur. J. Entomol. 98 (4): 547-549, 2001 | DOI: 10.14411/eje.2001.069

The effects of temperatures of 15, 20, 25 and 30°C on the duration of premating and preoviposition periods of Harmonia axyridis reared on the aphid Aphis fabae, were compared in the laboratory. The course of oviposition was monitored at 25°C in females reared on Aphis fabae and the peak of egg laying was recorded at the age of 15 to 45 days. The size of egg groups (batch size), as well as daily and total fecundity was recorded. Half of the total number of eggs was laid in batches of 10-30 eggs. The mean daily and total fecundity reached a maximum of 42 and 1,641.6 eggs, respectively. Adult females oviposited for almost their...