762 BOSTON JOURNAL 



% Antennae, terminal joint as long as the first, arcuated : wings 

 not distinctly tinted with dusky except in the radial cellule : ab- 

 domen, with the exception of the two yellow spots, black : tarsi 

 paler than the tibiae and thighs. 



Var. a. Yellow spots of the tergum obsolete. 



Length three-tenths of an inch. 



In form, size and color, very similar to A. sjnnosus, (^Pompilus,) 

 Panzer. But in that species the feet are blackish, &c. 



2. A. MELLEUS. — 9 Honey-yellow; head, pectus, and tip of 

 the abdomen black. 



Inhabits Indiana. 



Thorax honey-yellow: head black : mouth, anterior [381] orbits 

 and basal joint of the antennae excepting aline on the exterior side, 

 whitish : region of the scutel dusky : wings with a dusky band : 

 metathorax honey-yellow, with the elevated lines rather slender j 

 the lateral lines of the dorsal area arcuated : tergum with the first 

 and second segments honey-yellow, the latter with a lateral 

 whitish spot j remaining segments blackish ; anal segment ob- 

 scure 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 spe- 

 cies ; 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 nearly rectilinear. 



CERCEIIIS Latr. 



1. C. FUMiPENNis. — % Black; tergum with a broad band 

 and very narrow ones ; wings blackish. 



Inhabits Indiana. 



Body black, densely punctured : head with a golden, suborbi- 

 cular, orbital spot beneath the line of the antennae, and dense 

 golden ciliaB each side at the mouth ; antennae entirely black : 

 collar with two yellow spots : behind the scutel a transverse, 

 yellow line : wing-scale with a small yellow spot : wings black- 

 ish ; first recurrent nervure entering opposite to the dividing 

 nervure of the first and second cubital cellules : tergum, incisures 

 wide ; first segment rounded ; second with a broad, equable, ter- 



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