137 



collar is also broader than usual and is often acute or carinated 

 in front, never subinterrupted. The males have the sides of 

 the seventh sternite with long teeth or spines much as in the 

 Cressoni group of North America but the eighth sternite is 

 never bilobate or expanded at apex. The edeagus is ordinary 

 in form for Hylaeus. This group is Ethiopian so far as my 

 knowledge goes. Type Prosopis curvicaHnata Cameron. 



The following table will serve to distinguish the species 

 of Deranchylaeus collected in Africa during 1914 and 1915 

 and the notes and bibliography may assist in the study of the 

 group. With the species treated under Metylaeus and Nothy- 

 laeus, it is designed to include in the present treatment all 

 Ethiopian Hylaeidae so far known. 



Females. 



1. First tergite distinctly punctate, the punctures nearly 



as large as those of the mesonotum 2 



First tergite impunctate or with very minute punctures .5 



2. Clypeus not impressed immarginatus 



Clypeus impressed subapically 3 



3. Impression of clypeus not definitely limited above. 



Mark on the face opposite the base of the antennae 

 narrowed below, subinterrupted line on the collar, 

 spot on the base of the tegulae and on the tubercles 



whitish Dregei 



Impression of clypeus transverse well defined, collar 



and tubercles dark, knees more or less pale 4 



4. Clypeus medially subtuberculate above the impression, 



basal one fifth of hind tibiae pale o\\twsirdly...-Haygoodi 

 Clypeus not subtuberculate above the impression; hind 

 knees and tibiae entirely dark Liglitfoot'i 



5. Propodeum with the basolateral areas separated from 



the posterior face by a carina 6 



Propodeum with the basolateral areas not separated 

 from the posterior face 7 



6. Mandibles, clypeus. supraclypeal area below, lower 



