OSBORN AND BALL REVIEW N. A. SPECIES OF IDIOCERUS. I 29 



Idiocerus snowi G. & B. 



Hemiptera of Colorodo, p, 7g, 1895. 



Pale green, elytral suture and two spots on vertex dark. Length, 

 5 25—75 mm.; width, 1.8 mm. 



Face pale yellowish, two small round black spots on vertex, tip of 

 clypeus bright green. Pronotum and scutellum unmarked. Elytra 

 pale yellowish green, the apical nervures and margin slightly darker, a 

 dark brown band along the sutural margin from the apex of scutellum 

 to the apex of clavus. The costal nervure green. Legs and beneath 

 yellowish, tarsi green. 



Face short, rounding below; male antennae not inflated; outer 

 nervure of elytra forking at or before its juncture with the second, the 

 outer branch forming a triangular anteapical cell, before curving away 

 to the costa. LHtimate ventral segment of female moderately long, 

 posterior margin with the corners rounded and the center emarginate; 

 pygofers long, much exceeded by the attenuate ovipositor. 



The dark marking on the suture is somewhat variable; when heavy 

 this species resembles sufi/ralis; when very pale, pallidus ; but it is 

 readily separated from either by the spot on the vertex, the simple 

 antennae in the male and the emarginate female segment. 



Occurs on willows, apparently preferring the narrow-leaved varie- 

 ties. Specimens are at hand from Iowa, Colorado and Ohio. 



Idiocerus brunneus O. & B. (Plate III., Fig. 3.) 



Proc. Davenport Acad. Nat. Sci., Vol. VII., p. 72. (Jan., 1898.) 



Dull cinnamon brown, two black spots on the vertex. Broad with a 

 depressed face. Length, 5.5 mm; width, 2 mm. 



Face tawny; a yellowish circle around the black spots and an inter- 

 rupted line below; ocelli black; pronotum and scutellum cinnamon 

 brown with lighter markings in the female, darker with black spots on 

 scutellum in male. Elytra brownish sub hyaline with distinctly tuber- 

 culate dark brown nervures. Head broad, face much depressed, the 

 front broad and convex, outer fork of first sector forking again some 

 distance beyond the cross nervure, the outer branch curving away to 

 the costa, rarely forming an anteapical cell. 



Ultimate ventral segment in female very short, slightly produced 

 and obsoletely notched in the middle; pygofers short, broad, only 



