1848 



REPORT OF THE CHIEF OF ENGINEERS. 



KEPOBT. 



HYMENOPTERA. 



Urocerus FlavicoJ-nis, Fab. 9 • 

 {Sirex Bizonatus Steph.) 



Apathus Elatus Fab. $ . 



TEXTHEEDIXID^E. 

 UROCERUS. 



apid^. 



APATHUS. 



Bombus Fervidus Fab. $ $ var. 

 Bombus Ternarius Say. 



Megachile Bucephala Smith. 



Melissodes Trifasciata Cress. 

 dnthidium Formosum Cress. 



Vespa Occidentalis Cress. 

 Polistes Sulphurea Sanss. 



PompiJus JEtluops Cress. 

 Ichneumon Longuhts Cress., $ . 



Ophion Purgatus Say. 

 Ophion Bilineatus Say. 



Thyreopus Vicinus Smith, $ 



Smicra Bimaculata, n. sp. 



BOMBUS. 



MEGACHILE. 



MELISSODES. 

 ANTHIDIUM. 



VESPID2E. 

 VESPA. 



POLISTES. 



POMPILIXLE. 



POMPILUS. 



ichxeumo:ntd.e. 



ICHNEUMON. 

 OPHION. 



THYREOPUS. 



CHALCIDIDJE. 



SMICRA. 



Black; face prolonged beneath eyes, closely punctured, on each side at base of an- 

 tennae a subtriangular, lemon-yelknv spot; mandibles castaneous at tips; scape of 



