. 282 Say^s Descriptions of 



OBSERVATIONS. 



This new genus differs from all others with which I 

 am acquainted, that have nerveless wings, by having the 

 superior wings doubled, by an equal fold, and at their 

 tips a deep and obvious fissure. I have, as yet, seen 

 only the male. 



SPECIES. 



C.jfoJita. Black; feet honey-yellow. 



Inhabits Indiana. 



Body polished, black : head anteriorly rugose and bi- 

 angulated : antennce at base, excepting the first joint, 

 piceous : thorax with two impressed lines : wings with 

 short hairs and cillate : ahdomen oblong-oval, basal seg- 

 ment with elevated lines. 



Length about 6ne twelfth of an inch. 



( o 



Taken on the window July 20. 



PsiLUS, Jur. 



L P. terminaius. Black; feet and base of the an- 

 tennae honey-yellow. 



Inhabits Indiana. 



Body black, polished, with a few, rather long, scat- 

 tered hairs : antenn<z thirteen-jointed, elongated, genicu- 

 late between the second and third joints, honey-yellow ; 

 first joint in a frontal groove ; second joint elongated, 

 subfasiform, third joint cyathiform ; remaining joints 

 monihform, equal to the eleventh joint, which is Abruptly 

 dilated and with the twelfth equal, subquadrate, black; 

 thirteenth joint subequal to the preceding, globose-ovate, 



black : wings with short cilis, and with short hairs ; 



