OF XATunAL iiisTonv. 707 



more prominent than above, ami convex: antenntc dull Yellow- 

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

 the middle one is abbreviated before the midflle : nietatlmrax 

 dusky: wings hyaline: teryum yellowish, somewhat jioli>lHMl 

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

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

 Length of the body three-twentieths of an inch. 



Somewhat resembles the jireceding, but the luiiiy vestnro dis- 

 tinguishes it from all the foregoing species. 



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

 of the tergum bisinuatc at tip, bhiek at base. 

 Inhabits Indiana. 



^ llather dull honey-yellow, with minute hairs: heail more 

 prominent and paler beneath the antenniu: antenme dull yellow- 

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

 side: pleura with a black uliliijuc line under the wings: nieta- 

 thorax black : wings hyaline ; ncrvures 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 exsertcd 

 beyond the tip of the abdomen, black. 



% 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 vcstitor, but is more slender, larger, and diflVrcntly 

 marked. 



$. B. RUOULOSUS. — Iloney-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 rugse : mouth obscure piceous : antennae obscure pi- 

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

 guineous, aud with three abbreviated, blackish vittae; bcbinJ 

 1835.] 



