The fourth instar larva of Stilobezzia punctulata Lane is described for the first time and the one of Stilobezzia fiebrigi Kieffer is redescribed. They are illustrated and photomicrographed from material collected in different aquatic environments of the province of Corrientes, Argentina. Both species show features typical to carnivorous-predatory larva.

proximately the same illumination as the unrectified l5 watt bulb. We installed diodes in our traps (it takes about 15 minutes per trap) in the summer of 1984 and had to replace only two bulbs the entire season. The only drawback that we could see to this modification is the possibility of close lightning shorting the diode. In that case, the bulb would burn at full brightness, but would not go...

Bioirrigation or the transport of fluids into the sediment matrix due to the activities of organisms such as bloodworms (larvae of Diptera, Chironomidae), has substantial impacts on sediment respiration in lakes. However, previous quantifications of bioirrigation impacts of Chironomidae have been limited by technical challenges such as the difficulty to separate faunal and bacterial respiration...

Previous studies on Culicidae in the state of Santa Catarina, Brazil, were limited to Anophelinae and Culex quinquefasciatus due to the past occurrence of malaria and filariasis but the mosquito fauna in forested areas is still almost unknown. It was carried out a survey of mosquitoes with morning biting activity in a tourist trekking trail of an Atlantic forest reserve area in the island of Sa...

Analyses of 2 light trap catches comprising 6,041 and 1,598 Culicoides showed that the reliability of subsampling such catches increased with subsample size, while the subsampling error decreased with an increase in the number of individuals per species present in a subsample. Subsamples comprising approximately 500 Culicoides are deemed sufficient for comparing population densities between sit...

Life stages of Palpomyia sohraensis sp. n. is described and illustrated with bio-ecological notes. Key to the adult of the all species from India of the genus Palpomyia Meigen is also provided. The complete life stages of any Palpomyia are described for the first time from the Oriental Region.