382 



Say^s Descriptions of • 



on the inner side and tip of the exterior side black: tarsi^ 

 anterior pair dull yellowish; posterior pairs, except at 

 base, blackish : venter immaculate. 



Length over two fifths of an inch. 



Resembles C, deserta^ Nob." but aside from other dif- 

 ferences it may be distinguished by that species having 

 somewhat clearer wings and the inosculation of the first 



nervure 



second, or petiolated cubital cellule ; the antennae also in 

 that species are yellowish before, towards the base ; the 

 scutel has tw'o spots in addition to the yellow line behind 

 it; and the bands of the tergum are always broader than 

 In the present species. The fallax, Nob. differs in having 

 the transverse yellow line on the scute], in a direct line 

 between the origin of the posterior wings ; whereas in the 

 present species it is behind the scutel. 



2- C. sexia. 



tergum ; metathorax with a lateral spot. 



segment 



Missouri 



Body 



basal joint of the antennae beneath, yellow ; third joint 

 of the antennae dull honey-yellow : collar with two large 

 yellow spots : wi?ig-scale and transverse line behind the 



L 



scutel yellow ; the triangular impunctured space behind 



transverse 



longitudinal one in the middle : wings a little fuliginous 

 particularly on the margin and tip ; nervures brown ; 

 stigma yellow ; recurrent nervure of the second cubital 

 cellule entering at its middle : metathorax with a large, 

 oval, longitudinal, yellow, lateral spot : tergum with a 

 broad yellow band on each segment ; that of the first or 



segment 



feet 



