Bat-bugs (Hemiptera, Cimicidae) Sandy brown and flattened dorso-ventrally, these bugs are very closely related to our own bedbug and can bite humans. Eggs are laid around the roost, and the nymphs and adults venture onto the bats to feed on blood. They are not well adapted to travel with the bats and it is more likely that they or their cast skins will be found around the roost site or in the guano. One species is quite common on a variety of bats a second species is doubtfully recorded. A monograph of the family was published by Usinger (1966) and Péricart (1971).