no 



North American Hymenopera. 287 



Length over one fifth of an inch. 



Inhabits Indiana. Common. 



3. F. invparis. $ Body light honey-yellow, impunc- 

 tured: head small: eyes oval, black: mondihles^ teeth 

 black: ivings very slightly tinged with fuliginous; 

 recurrent nervure ; terminal line of the brachial cellule 



anal nervure 



robust to Its tip, arcuated from its origin, scarcely undu- 

 lated, not communicating with the axillary nervure : scale 

 emarginate at tip, often deeply and acutely : tergurn^ disks 

 of the incisures a little deeper colored. 



Length nearly three tenths of an inch. 



^ Very small in comparison with the female ; black : 

 mouth piceous : feet dull honey-yellow : thighs^ except- 

 ing the knees, black. 



LenfTth less than three twentieths of an inch. 



angulated, the anal half being obKque; 



This species is common in Indiana. The great dis- 

 parity in color and magnitude between the male and 

 female, would deceive, as to their specific identity. 



They appeared in great numbers on the 2d of April; 

 the. males swarmed around small bushes, alighting on the 

 branches and leaves. The females were but few. 



t 



B. First cubital cellule with a recurrent nervure. 



4. F. sessilis. Peduncle concealed by the abdomen* 



Inhabits Indiana. 



Body blackish : mouth dull honey-yellow : antenncer 

 rather long: thorax with the three segments very dis* 

 tmctly marked: peduncle composed of a simple, oblong, 

 body ; destitute of a scale, unless it be depressed and 

 united to the surface of the peduncle, concealed by the 

 first segment of the abdomen : abdomen projecting over 

 the peduncle and having a deep and well defined groove 

 beneath the first segment for its reception : feet, except-- 



