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 lonfl: teeth or spines much as in the 

 Cressoni G;roup of jSTorth America but the eighth sternite is 

 never bilobate or expanded at apex. The edeagiis is ordinary 

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

 knowledge goes. Type Prosopis curvicarinata Cameron. 



The following table will serve to distinguish the species 

 of Deranchylaeus collected in Africa during 1914 and 1015 

 and tlie notes and bil)liograpliy may assist in the study of the 

 group. AVith 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 piinctures 5 



2. Clypeus not impressed .iinnud'/inafus 



Clypeus impressed subapically 3 



3. Impression of clypeus not (U'tinitely limited above. 



^fai'k 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 t\d)ercl(^s 



whitish Drerjn 



Impression of cly])eus ti'ausverse well defined, eolhu' 



and tubercles dark, knees mor(^ or less ])ale 4 



4. ('lypeus medially subtuberculate above the ini]iression, 



basal one iifth of hind tibiae pale i>ut\\i\Vi]]y....l/iii/(/()OfJI 

 Clypeus not subtuberculate above the impression ; hind 

 knees and tibiae entirely dark Lif/Jtffooti 



5. Propodeum with the basolateral areas separated from 



the posterior face by a carina 6 



Propodeum with the basolateral areas not separated 



fi'oni the ])osterior face 7 



(>. Maiidililes. clypeus, sn})raclypeal area below, lower 



