224 long's second expedition. 



in the middle ; fourth and fifth segments, hands slightly inter- 

 rupted ; venter immaculate. 



Length nine-twentieths of an inch. 



In the collection of Mr. William W. Wood. 



This species would seem to be allied to the serena, judging by 

 the description that Fabricius gives of that insect, particularly 

 as he describes the costal margin of the wings to be fuscous. 

 That insect, however, is stated to be only a little smaller than 

 the namea of the same author, a size which at once puts that 

 species out of the question. 



POMPILUS Fabr. Latr. 



1. P. fascipennis. — Black; wings hyaline, with a fuscous 

 band near the tip ; abdomen rufous at base. 



Inhabits United States. 



9 Hypostoma and inferior portion of the front, with [333] 

 numerous silvery hairs ; wings with fuscous nervures ; a fuscous 

 band including nearly all the radial cellule, and not reaching the 

 posterior angle ; tip slightly margined with fuscous ; posterior 

 thighs and tibiae at base rufous ; abdomon sessile, first and second 

 segments rufous. 



Length about three-tenths of an inch. 



2. P. MARGINATUS. — Black ; wings dusky, with a broad, 

 darker posterior margin ; abdomen sessile, first and second seg- 

 ments rufous. 



Inhabits North-west Territory and Missouri. 



9 The terminal dark margin of the wings is so broad as to 

 reach almost to the terminal cubital cellule, and passes round on 

 the costal margin to the origin of the radial cellule ; on the in- 

 ferior wings is also a broad, terminal, darker margin. 



Length two-fifths of an inch. 



Very similar to the preceding, but manifestly distinct by the 

 above characters. 



CEROPALES Latr. 



1. C. fasciata. — Black; thorax and tergum spotted and 

 banded with pale-yellowish ; feet ochreous, tarsi pale yellow. 

 Inhabits United States. 

 Front, labruni, and orbits yellow, the latter interrupted above ; 



