OF NATURAL HISTORY. 7gl 



% Body black : stethidium clotlicl with ycllow-fcrrufpnou., 

 hair : head, hair on the superior part like that of the thormx : 

 nasus with a large, yellow, transverse spot before : labruin with 

 prostrate whitish hairs, and generally an obscure yollnwixh. longi- 

 tudinal line : antennae, rather short, beneath exeepting the baml 

 joints, dull piceous : wings hyaline : tcrgum, first Hcgnient, ex- 

 cept at its tip, hairy like the thorax ; second segment with a 

 white band at base and another on the posterior subniargin, 

 united at the sides ; posterior margin and transverse middle 

 black; third and fourth segments white with black poHt«rior 

 margins; remainder white ; tarsi ferruginous. 



Length two-lifths of an inch. 



9 Antennao, color as in male : nasus immaculate : posterior 

 feet with long ferruginous hair. 



Length nearly half an inch. 



A common species; at first sight somewhat like ohliqua nob. 

 which however is much larger, the bands of the tergum much 

 narrower and more oblique than in the present species. In 

 magnitude this species does not seem to differ widely from that 

 which J)rury names anmilaris ii. pi. 37, /. 7. That figure is, 

 however, a very uncertain one, even as respects Its genus, and in 

 my copy of the work, does not at all agree with the description 

 which accompanies it. 



The bands of the tergum have a pruinose appearance in con- 

 sequence of the shortness of the hair of which they are compowd. 

 The antennae of the male do not reach the posterior extremity of 

 the thorax. [406] 



4. ]NI. RUSTTTA. — Tergum with white bands, double on the 

 second segment; hair of the thorax whitish. 



Inhabits Indiana. 



% Body black, with whitish hair : antennrc longer than the 

 stethidium ; beneath, excepting the three basal joint.><, dull pice- 

 ous : nasus wbitc : thorax with whitish hair: wing-scale black : 

 wings hyaline ; ncrvures fuscous : tergum, first segment, except- 

 ing at its tip, hairy like the thorax ; bands white, not much di- 

 lated ; second segment with one at base and another behind the 

 middle, confluent each side ; remaining segments with a band on 

 the middle of each : tarsi towards their tips ferruginous. 

 1837.] 



