JAMES A. G. REHN AND MORGAN HEBARD 



279 



der's larger figure of the male supra-anal plate of the present 

 insect. 



The present species is separable from all others of the genus by 

 the much broader tegmina which are dull and very leaf-like, this 

 partially due to the veinlets which are heavier than in any other 

 species of the genus. This insect, though distmctive in this 

 character also, has the production of the supra-anal plate of the 

 male somewhat similar in general development to S. curvicauda 

 and has been confused with that species by several of the early 

 authors. The distal flanges of this production are produced ven- 

 trad in strongly compressed vertical flanges, deepest proximad at 

 their arcuate bases which are situated at the bifurcation of the 

 distal portion of the plate; curvicauda and its races have homol- 

 ogous flanges which are shorter, evenly arcuate in outline and 

 occupy the proximal two-thirds of the distal flanges. 



Females of pistillata bear a close general resemblance to females 

 of S. curvicauda borecdis, but in addition to the tegmmal charac- 

 ters given above, the eyes of the present insect are verj' decidedly 

 smaller and the caudal limbs verv much shorter. 



Measurements {in millimeters) of extremes 



TRANS. AM. ENT. SOC, XL. 



