so?ne British Guiana Hymenoptera. 313 



Genus Dielis, Sauss. 



D. dorsata, F. Of common occurrence in most parts of 

 the Colony. 



D. hyalina, Lep. (= D. fallax, Sauss.). Fairly common 

 in most parts. 



D. variegata, F. Issororo, N.W.D. 



Genus Elis, F. 



E. flavopicta, Smith. Turkeyn, East Coast, Demerara, 



Family RHOPALOSOMIDAE. 



Genus Rhopalosoma, Schulz. 



R. guianense, Schulz. At light, Rockstone, Essequebo 

 River. 



Family PSAMMOCHARIDAE. 



Genus Pseudagenia, Kohl. 



P. comparata, Sm, Tumatumari, Essequebo River. 

 P. chlorosoma, Sm. Puruni River. 



Subfamily PEPSIN AE. 

 Genus Cryptochilus, Panz. 

 C. purpureipes. A common species on the coast lands. 



Genus Pepsis, Fab. 



P. tinctipennis, Smith. Issororo, N.W.D. 

 P. sapphiria, P. de B. Rockstone, Essequebo River. 

 P. jucunda, Mocs. Rockstone, Essequebo River. 

 P. chlorotica, Mocs. Onderneeming, Essequebo. 

 P. nigrescens, Smith. Rockstone, Essequebo River. 

 P. dimidiata, F. Rockstone, Essequebo River. 

 P. amethystina, F. A common species in most parts of 

 the Colony. 



P. seladonica, Dahlb. Issororo, N.W.D. 



SubfamUy P8AMM0CHARINAE. 

 Genus Pompilogaster, Ashm. 



P. philadelphica, Lep. A common species on the coast 

 lands. 



