Hematophagy and hormone release

Hematophagy is a life style exhibited by approximately 14,000 species of insects from 5 orders, but detailed physiological information is available for only a few species. This review focuses on 2 well-studied insects, Rhodnius prolixus Stal an obligatory hematophage, and Aedes aegypti (L), an optional hematophage. Emphasis is placed on hormones that are released after blood-feeding that stimulate diuresis, molting, and reproduction. Even though these 2 insects have been studied since the 1930s, many areas of research are still unexplored. The review and extensive reference list will be beneficial for researchers working with predacious Hemiptera and protein-feeding Diptera.