'S54 Say^s Descriptions of 



Length to tip of wings over three twentieths of an 



inch. 



Of the same general habit with heUtor^ but is consid- 

 erably larger, and may. be known at once apart from it, 

 by the equality, at their junction, of the 1st and 2d cubital 

 cellules, by the punctured tergum, &^c. 



6. B. vcstitor. With prostrate hairs j basal joint of 



the tergum bi-sinuate at tip. 



Inhabits Mexico, 



$ Body with very numerous, minute, prostrate hairs : 

 head blackish, with dilated dull fulvous orbits ; before 

 the antennae more prominent than above, and convex : 

 antenncd dull yellowish : thorax dull fulvous, with three 

 dilated black lines, of which the middle one is abbre- 

 viated before the middle : meiathorax dusky : wings hya- 

 line : tergum yellowish, somewhat polished towards the 

 tip ; lateral edge dusky ; first segment at tip bi-sinuate or 

 three-angled : feet paler : thighs a little dusky. 



Length of the body three twentieths of an inch. 



Somewhat resembles the preceding, but the hairy ves- 

 ture distinguishes it from all the foregoing species. 



7. B, scrutator. Yellowish; with prostrate hairs ; 1st 

 joint of the tergum bi-sinuate at tip, black at base. 



Inhabits Indiana* 



$ Rather dull honey-yellow, with minute hairs : head 

 more prominent and paler beneath the antennsp.: antenna 

 dull yellowish: stemmata black: thorax with a slender 

 black line each side : pleura with a black oblique line 

 under the wings : metathorax black : wings hyaline ; 

 nervures pale brownish ; stigma yellowish at base ; 2d 

 cubital cellule shorter and narrower than the first: tergum 

 elongate sub-obovate, black at base, this color extending 



paler on each side ; middle of the disk towards the base 



