> 



m 



North American Hymenoptera. 



401 



a C^LioxYS, is described as having the abdomen brown 

 and with only two spines. 



The armature of the tall of the Q-dentata^ resembles 

 that of C. conica, L. but tlie middle spines are much 

 more robust and obtuse ; the bands are more distinct and 

 the abdomen opake in the male, ' 



2. C. alternata. Bands of the tergum alternately in- 

 terrupted ; $ tail 10-spined. 

 'Inhab. Indiana. 



(J Body black; punctured ; the punctures not much 

 crowded : head with short, white hair, almost naked on 

 the vertex : front with long, white, dense hair : anfen/i^c, 

 tip of the basal joint obscurely piceous : thorax an inter- 

 rupted, arcuated, white line before, curving over the 

 Wings ; a line before the scutel, and another at its tip, 

 white : wing-scale dull honey-yellow : wings yellow fuli- 

 ginous, 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 ifuliginous color, excepting on the stigma. 

 Length over half an inch. 



NoMADA, Scop. Latr. 

 L N. vtncta. Tergum, with yellow bands which are 



obsoletely margined with ferruginous. 



Inhabits Indiana 



VOL. I. PART TV. 



52 



