142 



with the description of tenuis though there are definite strong 

 hair patches on the lateral margins of tergites 1-3 and the 

 length is 5 nnn. or a little more. The male agrees well with 

 the S described as the S of atriceps. Some of the males 

 have the supraclypeal area dark except a narrow line along 

 the anterior margin. These are similar to the male described 

 as tenuis <5 and belong with the others as proved by the study 

 of the genitalia. After carefully reading Cameron's descrip- 

 tions of Prosopis curvicarinata and rohcrtiana I am inclined to 

 l^elieve that both of them refer to the same species and that 

 the material compared as curvicarinata with robertiana was 

 some other species. The species is apparently the same as ten- 

 uis Alfken, but only the examination of the types could remove 

 all uncertainty — if it could be ascertained which is Cameron's 

 true tyj)e. 



The differences of venation mentioned by Cameron are of 

 no importance since I have found the same difference in the 

 venation of males of this species ascertained to be the same by 

 the examination of the genitalia. 



Hylaeus (Deranchylaeus) Dregei (Strand). 



Prosopis dregei Strand. 



Soc. Ent. 27 :27 S Cape Colony, So. Afr. 1912. 



The 5 previously undescribed is perhaps sufficiently differentiated in 

 the table. The ist and 2nd tergites bear apical lateral white hair patches. 

 Length 6 mm. ; wing 4.5 mm. 



$ Seventh sternite with the lateral spines very strongly developed 

 on the sides of the middle piece and the posterior (apical) margin of 

 the basal lobes, the apical lobes flaplike, elongate, membraneous. 



Median process of 8th sternite elongate ( somewhat similar that of 

 Hylaeus nipponicus but not so acute nor so strongly chitinized), about 

 as long as the width of the basal part on either side. The sides of the 

 "basal part in a straight line with each other. 



Edeagus with the stipites about as long as the sagittae. 



One 5 and 1 $ $ collected at Cape Town, Jan.-Apr. 1915 

 (Bridwell). 



