EJE, vol. 96 (1999), issue 1

The physiology of cold hardiness in terrestrial arthropods


Eur. J. Entomol. 96 (1): 1-10, 1999

Insects and other terrestrial arthropods are widely distributed in temperate and polar regions and overwinter in a variety of habitats. Some species are exposed to very low ambient temperatures, while others are protected by plant litter and snow. As may be expected from the enormous diversity of terrestrial arthropods, many different overwintering strategies have evolved. Time is an important factor. Temperate and polar species are able to survive extended periods at freezing temperatures, while summer adapted species and tropical species may be killed by short periods even above the freezing point.

Some insects survive extracellular ice formation,...

Entomology and nature conservation


Eur. J. Entomol. 96 (1): 11-17, 1999

Interest in insects as conservation foci and as tools in broader conservation assessment has accelerated markedly in recent years, but the diversity and complexity of insect life demands a more focussed and structured approach to \"biodiversity\" and inventory studies than has commonly occurred. Strategies for insect conservation are reviewed, together with the variety of uses for insects as ecological tools in broader monitoring of environmental quality. Principles fur selecting optimal focal groups are discussed, and the importance of developing standard protocols to sample and interpret insect assemblages emphasised. The global values and relevance...

Book Review: Temperature Sensitivity in Insects and Application in Integrated Pest Management.


Eur. J. Entomol. 96 (1): 18, 1999

Hallman G.J. & Denlinger D.L. (eds): Temperature Sensitivity in Insects and Application in Integrated Pest Management. Westview Press, Boulder, Colorado and Oxford, UK, 1998, 311 pp.

Survival and reproduction of small blow flies (Calliphora vicina; Diptera: Calliphoridae) produced in severely overcrowded short-day larval cultures


Eur. J. Entomol. 96 (1): 19-22, 1999

In diapause-destined larval cultures of the blow fly, Cailiphora vicina, competition through severe overcrowding forces down body size and causes the smaller individuals to escape from the diapause \"programme\" to form miniature puparia. Among the diapausing cohort, smaller larvae contain a similar proportion of fat to larger larvae, and a similar rate of fat metabolism over the first 7 weeks in diapause. However, these smaller diapausing larvae are much less cold tolerant than larger individuals. Of the miniature larvae that side-step the diapause programme to form puparia, even the smallest of them are capable of development to the adult,...

Distribution and abundance of ladybirds (Coleoptera: Coccinellidae) in non-crop habitats


Eur. J. Entomol. 96 (1): 23-27, 1999

The abundance and distribution of coccinellids in non-crop habitats was studied using removal sampling and visual observation. Coccinellids were most frequently found on grassland habitats. Coccinellid abundance appeared to be most strongly correlated with the percentage ground cover of thistle, grasses and nettles. The most commonly collected coccinellids were Coccinella septempunctata and Adalia bipunctata comprising 60% and 35% of the catches respectively. Most coccinellids were found on Rubus spp. with nettles (Urtica dioica) and grasses being the next most favoured plant species. Adalia bipunctata was the most...

Book Review: Quarantine Pests for Europe. Book Review: Illustrations of Quarantine Pests for Europe.


Eur. J. Entomol. 96 (1): 28, 1999

Smith I.M., McNamara D.G., Scott P.R., Holderness M. & Burger B. (eds): Quarantine Pests for Europe. 2nd ed. CAB International, Oxon & European and Mediterranean Plant Protection Organization, Paris, 1425 pp.
Smith I.M. & Roy A.S. (eds): Illustrations of Quarantine Pests for Europe. European and Mediterranean Plant Protection Organization, Paris & CAB International, 1996, 241 pp.

Life-cycles and biological features of eggs predators of Lymantria dispar (Lepidoptera: Lymantriidae) in the Mamora cork oak forest, Morocco


Eur. J. Entomol. 96 (1): 29-36, 1999

The gypsy moth oophagous predator guild in the Mamora forest is an assemblage of many species whose succession in egg masses enhances the exploitation of this food source. Life history, biological Features and trophic capacities of predator species are described from field observations and laboratory rearing. Extreme diversity of diets, capacity to resist prolonged fasting and extended larval development with extra-instars enable them to survive on the cork oak when gypsy moth egg masses are absent. The 1986-1990 gypsy moth outbreak occurred in a forest part where unhealthy cork oaks are common. by providing abundant shelter for numerous arthropods...

Environmental variables influencing the distribution of Hydraenidae and Elmidae assemblages (Coleoptera) in a moderately-polluted river basin in north-western Spain


Eur. J. Entomol. 96 (1): 37-44, 1999

The Hydraenidae and Elmidae assemblages living in the Órbigo River Basin (NW Spain) were studied during one year. The aim of the research was to determine which factors were best related to species composition. This knowledge is the first step towards the definition of indicator species or assemblages.

Canonical Correspondence Analysis (CCA) showed that altitudinal gradient was the factor most correlated with beetle distribution. However, some other variables, such as water mineralization and eutrophication, were also important.
Using TWINSPAN program, groups of sites were defined and, afterwards, represented on the CCA diagram. Several species...

Morphology of accessory ovaries in adult males of Perla marginata (Plecoptera: Perlidae)


Eur. J. Entomol. 96 (1): 45-51, 1999

Bisexual gonads in the stoneflies Perla burimeisteriana, P. pallida and Dinocras cephalotes are reported for the first time. Gross morphology and ultrastructure of the accessory ovaries of mature larvae and adult males of Perla marginata are described in detail. There are 36-58 male ovarioles situated distal to the paired testes and opening into fused termini of the lateral ducts in abdominal segments II and III. These correspond in structure to the ovarioles of adult females but are significantly smaller (maximum size of proximal oocyte 9.0 × 45 µm) and each usually contains 10-14 linearly arranged previtellogenic...

Book Review: Coleoptera: Elateroidea.


Eur. J. Entomol. 96 (1): 52, 1999

Calder A.A. 1998: Coleoptera: Elateroidea. In Wells A. (ed.): Zoological Catalogue of Australia. Vol. 29.6. CSIRO, Melbourne, xiii + 248 pp.

Blaena tamasi sp. n. from Western Australia, the first species of Cydnidae (Hemiptera: Heteroptera) with staphylinoid wing modification


Eur. J. Entomol. 96 (1): 53-55, 1999

Blaena tamasi sp. n., the first species of Cydnidae with staphylinoid modification of wings, is described from Western Australia. The rare cases of wing modifications in Cydnidae and Pentatomoidea are briefly discussed. A key to all known species of the genus Blaena Walker is also provided.

Book Review: Psocoptères Euro-Méditerranéens


Eur. J. Entomol. 96 (1): 56, 1999

Lienhard C.: Psocoptères Euro-Méditerranéens. Faune de France 83. Fédération Française des Sociétés de Sciences, Naturelles, 1998, xx + 517 pp.

Larvae of Ataenius (Coleoptera: Scarabaeidae: Aphodiinae): Generic characteristics and species descriptions


Eur. J. Entomol. 96 (1): 57-68, 1999

We compared the larval morphology of the genera Ataenius and Aphodius. The third larval instars of five Ataenius species: Ataenius opatrinus Harold, A. picinus Harold, A. platenis (Blanchard), A. simulator Harold and A. strigicauda Bates, are described or redescribed and illustrated. The most important morphological characteristics of the larvae of Ataenius are found in the respiratory plate of thoracic spiracle, the setation of venter of the last abdominal segment, the setation of the epicranial region and the morphology of the epipharynx. A key to larvae of the known species of Ataenius...

Effects of rearing history and geographical origin on reproduction and body size of the predator Podisus nigrispinus (Heteroptera: Pentatomidae)


Eur. J. Entomol. 96 (1): 69-72, 1999

The relationship between body size and reproduction was investigated for two laboratory strains of Podisus nigrispinus (Dallas). A strain originating from Surinam and maintained for about 15 years under laboratory conditions, did not demonstrate any significant relationship between body length and fecundity. A second strain originated from Brazil where it had been reared in the laboratory for several generations but under different conditions of climate, food and housing. In the first generation of the Brazilian strain, a significant positive relationship was found between body length and total number of eggs. Results suggest that colonization...

Pattern of cell punctures by the aphid Sitobion fragariae (Sternorrhyncha: Aphididae) and cell arrangement in the leaf tissues of wheat, Triticum aestivum


Eur. J. Entomol. 96 (1): 73-75, 1999

The pattern of cell punctures in the electrical penetration graph was studied from the start of a probe leading to the first phloem phase by the aphid Sitobion fragarine (Walker) (Sternorrhyncha: Aphididae) on two cultivars of the wheat, Triticum aestivum L., differing in hydroxamic acid concentration. In addition, the spatial arrangement of cells in the leaf of the host plant was histologically observed and the number of cells between the epidermis and phloem counted. The results suggest a feeding deterrent effect of hydroxamic acids and a constant styler puncturing activity into plant cells.

Book Review: Thysanoptera. An Identification Guide.


Eur. J. Entomol. 96 (1): 76, 1999

Mound L.A. & Kibby G.: Thysanoptera. An Identification Guide. 2nd ed. CAB International, Wallingford, New York, 1998, vi + 70 pp.

Book Review: Methods in Chemical Ecology. Vol. 2. Bioassay Methods.


Eur. J. Entomol. 96 (1): 77, 1999

Haynes K.F. & Millar J.G. (eds): Methods in Chemical Ecology. Vol. 2. Bioassay Methods. Chapman & Hall, Kluwer Academic Publishers, Norwell, USA, 1998, xx + 406 pp.