778 BOSTON JOURNAL 



2. C. ALTERNATA. — Bands of the tergum alternately inter- 

 rupted ; 'Stall 10-vSpined. 



Inhabits Indiana. 



% Body black, punctured; the punctures not much crowded : 

 head with short, white hair, almost naked on the vertex : front 

 with long, white, dense hair : antennae, tip of the basal joint ob- 

 scurely piceous : thorax an interrupted, arcuated, white line be- 

 fore, curving over the wings; a line before the scutel, and an- 

 other at its tip, white : wing-scale dull honey-yellow : wings 

 yellow fuliginous, more dusky at tip : tergum polished, punctures 

 more sparse than on the thorax; segments, particularly the 

 basal ones, white on their posterior margins ; and each segment 

 excepting the ultimate and basal ones, with a white interrupted 

 band before the middle ; tail concave above, with about ten 

 spines : feet black, more or less piceous : venter banded with 

 white. 



Length over two-fifths of an inch. 



9 Hair on the front, short; wings destitute of the yellow fuli- 

 i?inous color, excepting on the stigma. 



Length over half an inch. 



NOMADA Scop. Latr. 

 1. N. viNCTA. — Tergum with yellow bands, which are obso- 

 letely margined with ferruginous. 



Inhabits Indiana. [402] 



Body black : head beneath the antennae, ferruginous : orbits 

 yellow: antenna; ferruginous, dusky about the middle; terminal 

 joint paler : collar yellow : thorax each side over the wings, with 

 a dull ferruginous margin ; before the wings a yellow spot : wing- 

 scale honey-yellow : wings slightly dusky, particularly the ter- 

 minal margin : nervures honey-yellow : scutel subbilobate, yellow 

 line on the middle, posterior margin ferruginous : metathorax 

 near the scutel with a transverse line and an irregular, longitudi- 

 nal, quadrate spot each side behind, yellow : tergum with a yel- 

 low band, gradually contracted towards the middle, and obsoletely 

 margined with ferruginous, before the middle of each segment ; 

 anterior band a little undulated or denticulated : pectus with a 

 triangular, yellowish spot over the fore-feet : coxae, with a yellow 



[Vol. I. 



