Figure 1.

(A) The intromittent organ of the male bed bug (a modified paramere). The groove in which the paramere sits when not in use is visible underneath the paramere. (Bar = 0.1 mm.) (B) The site of copulation on the ventrum of the female's abdomen. The male always copulates at this site (the ectospermalege). This structure directly overlies the mesospermalege into which the sperm are ejaculated. (Bar = 1.5 mm.) (C) Detail of the ectospermalege showing the incurving of the female's sternite, which acts as a guide for the male's intromittent organ. (Bar = 0.1 mm.) A and C are used by permission of Andrew Syred (Microscopix, U.K.).