288 Say^s Descriptions of 



ing at basGj dull honey-yellow : wings with the discoidal 

 cellule, small, quadrate ; first cubital cellule not broader 

 than the radial, and bounded by a right line ; nervure of 

 the second cubital cellule obsolete. 



Length 9 three twentieths of an inch: neuter about 

 one tenth of an inch. 



The projection of the superior part of the basal seg- 

 ment of the neuter abdomen is more remarkable than that 

 of the female. It probably belongs to the genus Poly- 



EKGUS. 



A variety is much paler, even honey-yellow. 

 5. F. triangularis. Discoidal cellule subtriangular ; 

 blackish-piceous. 

 Inhabits Indiana. 



Body blackish-piceous or obscure reddish-brown : hy- 

 postoma convex and somewhat carinate : mandibles pice- 

 ous : wings whitish ; nervures pale ; discoidal cellule 

 subtrlangular, the superior angle being very obtuse ; first 

 and second cubital cellules not separated by a petiole ; 

 anal nervure abruptly angulated on the anal submargin : 

 scale rather thin, elevated : tarsi honey-yellow. 



(J Body darker. 



Length 9 over one tenth of an inch ; ^ aTaout the 

 same. 



Var. a. Recurrent nervure none. 

 Var. (?. Recurrent nervure obsolete or incomplete. 

 ^ Resembles sessilis, Nob. but the scale is^ obvious ; the 

 discoidal cell is more triangular and the nervure of the 

 2d cubital is obvious. 



6. F. dishcata. Yellowish ; anal nervure almost dis- 

 located at the anal eraargination. 

 Inhabits Indiana. 



Head black : hypostoma distinctly carinated : front 



