North American Hymenoptera. 



381 



orbits and hasal joint of the antennce excepting a line on 

 the exterior side^ whitish : region of the scutel^ dusky : 

 wings with a dusky band : metathorax honey-yellow with 

 the elevated lines rather slender ; the lateral lines of the 

 dorsal area arcuated : tergum with the first and second 

 segments honey-yellow, the latter with a lateral whitish 

 spot; remaining segments blackish ; anal segment obscure 

 piceous : pectus black : feet^ excepting the base of the 

 posterior coxae, honey-yellow. 



Length under one fourth of an inch. 



The prevailing honey-yellowish color distinguishes this 

 species ; and the metathoracic lineations are much finer 

 than those of the preceding species. The lateral lines of 

 the dorsal area of the metathorax in the oppositus are 



4 



nearly rectilinear. ' , - 



Cerceris, Latr. 



I 



1. C. fumipennis. $ Black; tergum with a broad 

 band and very narrow ones ; wings blackish. 

 Inhab. Indiana. 



4 



Body black, densely punctured : head with a golden, 

 sub-orbicular, orbital spot beneath the line of the antennae, 

 and dense golden ciliae each side at the mouth : antenn<B 

 entirely black : collar with two yellow spots : behind the 

 scutel a transverse, yellow line : wing-scale with a small 

 yellow spot : wings blackish ; first recurrent nervure en- 

 tering opposite to the dividing nervure of the first and 

 second cubital cellules : tergum, incisures wide ; first seg- 

 ment rounded ; second with a broad, equable, terminal 

 band ; remaining segments with each a terminal capillary 

 band, more or less interrupted in the middle ; posterior 

 band wider and somewhat irregular : tibi(B yellow pale. 



