Differential movement patterns and microhabitat distributions of age classes have recently been repotted in several water surface-inhabiting insects Uamieson and Scudder 1974, Vepsalainen and Jarvinen 1974, Wilson et al. 1978, Birch et al. 1979). Juvenile age classes may be displaced because of aggression by adults (Wilson et al. 1978) or because of selection for different microhabitats (Vepsal...

The Heteroptera have holocentric chromosomes with kinetic activity restricted to the end of chromosomes. The first meiotic division is reductional for the autosomes and equational for the sexual. Only a few species of this suborder have been analyzed. In this study, we observed the morphologies of the testes of the Heteroptera species Belostoma anurum (Herrich-Schäffer, 1948), Belostoma micantu...

This contribution is the first part of a series designed to summarize present knowledge on fauna true bugs (Hemiptera: Heteroptera) Socotra Archipelago. A review aquatic, semiaquatic and shore infraorders Nepomorpha, Gerromorpha, Leptopodomorpha provided. Nine families 19 species are recorded from Island (including two marine off-shore species). The following new records given: Micronecta eupom...

Data collected during an oceanographic cruise along the southeastern Brazilian coast from Cape Frio (22 degrees 58' S) and Paraná (27 degrees 50' S) in March 1982 showed that the marine insect Halobates micans occurred along the Southeastern Brazilian Bight, but in lower abundance in low-temperature areas due to the intrusion and upwelling of South Atlantic Central Water, and in low-salinity ar...