OSBORN AND BALL REVIEW N. A. SPECIES OF IDIOCERUS. 137 



Idiocerus nervatus V. D. 



Bulletin Buffalo Soc. Nat. Sci., V., pt. 4, 1894 (No. i) ; Cat., p. 261. 



Small, stout, pale green or yellowish, the oblique dark nervures of 

 the under wings showing through the hyaline elytra. Length, ? 4.75 

 mm.; c?, 4.50 mm.; width, 1.20 mm. 



Pale yellowish green, tarsi light green, elytra hyaline, the nervures 

 of the under wing showing distinctly above the green abdomen, outer 

 anteapical cell long, as in alte7'?iatus and verticis Ultimate ventral 

 segment of female scarcely wider than long, posterior margin nearly 

 truncate; male antennal discs small, nearly circular. 



Occurs on willows throughout the greater part of the United States, 

 though rarely in very great numbers. Specimens are at hand from 

 New York, New Jersey, Michigan, Iowa, Colorado and Arizona. A 

 very distinct little species, although other species often show the nerve 

 character. It can be readily separated ixo\x\. pallid us, which it most 

 closely resembles, by the smaller size and the long, nearly truncate, 

 segment of the female. 



Unknown Species. 



Idiocerus ramentosus Uhl. 



Bythoscopus ramentosus Uhler. Bull. U. S. Geol. and Geog. Surv., III., p. 

 465, 1877. 



Idiocerus ramentosus Van Duzee. Psyche, V., p. 389, i8go. Cat., p. 262 ; 

 Gillette & Baker, Hemip. Colo., p. 79. 



Idiocerus ittscriptus Uhler, in litt. (vide Van Duzee). 



As described, this species should be "pale testaceous more or less 

 clouded with rust brown and fulvous," "vertex with around black 

 spot each side, and a smaller black dot each side interior to the ocelli; 

 face sometimes irregularly marked with small brown spots and lines, 

 those above being arranged transversely and those below in a horse- 

 shoe arc." 



Specimens of both lachrymalis and alternatus have been received 

 labeled ramentosus and it is probable that most of the references for 

 this species should be credited to one or the other of these. 



Some of the darker specimens of 7'ufus show traces of black spots on 

 the vertex and answer the description fairly well except for the face 

 markings. If specimens are found with these also it is possible that 



