Few studies have reported on both species all over the world. Both species are difficult for species identification so, the present study was examined specimens by SEM and found microstructural characters that facilitate identification of them. A number of new characters were added to the previous e.g. shape of setae and other vestitures, shape and structure of the intercoxal processes and submentum, also some old characters were emended.

http://eajbsa.journals.ekb.eg/ Taxonomic revision of genus Lithurgus (Hymenoptera: Megachilidae) of Egypt with a new record

Key to subgenera of Coelioxys Latreille, 1809 1. Eyes without hairs (Fig.13); bandages of the abdomen with normal hairs [C.decipiens Spin.] ……………………………………….……………………..C. (Liothyrapis) -Eyes hairy (Fig.7); bandages of the abdomen with squamous hairs…………….C. (Allocoelioxys) Key to the female's species of subgenus C. Allocoelioxys(After modification of Alfken, 1934 and Warnke, 1992) 1. Fore coxa with a wide triangular tooth(Fig. 14); body with normal hair; Last sternum un serrated laterally, usually much wider than the last tergum; last sternum evenly narrowed; clypeus hairs the same length; metasomal terga and sterna with lateral large triangular bandages; clypeus