Evidence is presented that females of the cleptoparasite Thyreus ramosus (Lepeletier) insert their eggs into the closed host cells of an Anthophora (Dasymegilla), tentatively identified as A. muscaria Fedtschenko, just as other members of the Melectini whose egg deposition habits are known insert their eggs into host cells. The eggs of both host and cleptoparasite are described and illustrated. Comparison of the eggs of T. ramosus with those of other melectines strongly suggests that the melectines are monophyletic.