North American Hymenoptera. 235 



the middle, abbreviated before ; another blackish band 

 nearer the tip abbreviated behind ; tip margin dusky ; 

 second cubital cellule pentangular, its basal and terminal 

 lines not parallel : metatliorax a little rugose each side, 

 with a short, compressed tubercle each side on the de- 

 clivity : tergum with the basal segment polished ; third 

 segment black at base : oviduct nearly as long as the 

 abdomen : pleura with the incisures punctured : poste- 

 rior tarsi a little paler. 



Length half an inch. 



This is very much like C- caVipteruSy Nob. but the 

 wings are hyaline ; the cellules somewhat different ; the 

 inferior wings destitute of a central spot ; the body is of 



a deep rufous color, &:c. 



9. C. plurivinctus. Black; segments of the tergum 



margined with white. 



Inhabits United States. 



Body black : thorax with a short line before the wings 



and wing-scale yellow : wings hyahne, with a slight dusky 

 tinge ; nervures blackish ; stigma rufous at the stricture ; 

 second cubital cellule quadrangular, somewhat oblique, 

 meeting the radial cellule in an angle : abdomen almost 

 sessile : tergum with the first segment excavated near 

 the base ; densely punctured ; all the segments with 

 narrow, white posterior margins : oviduct exserted, short, 

 hardly half the length of the abdomen : feet honey-yel- 

 low ; posterior pair with the knees, tips of the tibiae and 

 of each tarsal joint, black. 



Length over half an Inch. 



S Hind pair of feet with an annulus on the tibiae and 

 base of each tarsal joint, white. 



The male is much smaller than the female. I ob- 

 tained a female from a follicle of the conmion foUiculate 



