OF NATURAL HISTORY. 707 



more prominent than above, and convex : antennce dull yellow- 

 ish : thorax dull fulvous, with three dilated black lines, of which 

 the middle one is abbreviated before the middle : metathorax 

 dusky : wings hyaline : tergum yellowish, somewhat polished 

 towards the tip ; lateral edge dusky ; first segment at tip bisin- 

 uate 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 vesture dis- 

 tinguishes it from all the foregoing species. 



7. B. SCRUTATOR. — Yellowish ; with prostrate hairs j 1st joint 

 of the tergum bisinuate at tip, black at base. 

 Inhabits Indiana. 



g Rather dull honey -yellow, with minute hairs : head more 

 prominent and paler beneath the antennae : antennce dull yellow- 

 ish : stemmata black : thorax with a slender black line each 

 side : pleura with a black oblique line under the wings : meta- 

 thorax 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 [255] pale yellow extending on the tip of the first segment, 

 which is sub-bisinuate or slightly three-angled ; second segment 

 as well as the first with an elevated line : oviduct not exserted 

 beyond the tip of the abdomen, black. 



I Third and following segments of the tergum annulate with 

 black ; no elevated line on the tergum, nor three-angled appear- 

 ance of the tip of the first segment. 

 Length less than one-fifth of an inch. 



Resembles vesHfor, but is more slender, larger, and differently 

 marked. 



8. B. RUGULOSUS.— Honey-yellow ; head, breast and three 

 lines on the thorax black. 

 Inhabits Indiana. 



Body honey -yellow ; head with rather wide and slightly im- 

 pressed punctures, which on the front are transversely confluent 

 into minute rugae : mouth obscure piceous : antennae obscure pi- 

 ceous, black towards the tip : thorax somewhat tinged with san- 

 guineous, and with three abbreviated, blackish vittoe; behind 

 1835.] 



