70 THE UNIVERSITY SCIENCE BULLETIN. 



Idiocerus nervatus Van D. 



(PI. 4, figs 7-9.) 



Idiocerus nervatus Van D., Bui. Buf. Soc. Nat. Sci., v, pp. 1T4, 205, 1894. 

 Idiocerus nervatus G. & B., Heniip. Colo., p. 76, 1895. 



Idiocerus nervatu 

 Idiocerus nervatu 

 Idiocerus nervatu 

 Idiocerus nervatu 

 Idiocerus nervati 



O. & B., Proc. Dav. Acad. Nat. Sci., vii, p. 137, 18! 

 Osb., 20th Kept. N. Y. St. Ent., p. 506, 1905. 

 DeL., Tenn. St. Bd. Ent., Bui. 17, p. 11, 1916. 

 Van D., Cat. Hemip. N. A., p. 575, 1917. 

 Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 18, 1919. 



Form: Next to verticis the smallest member of the genus found in 

 the state. A small, stout species with long elytra. Length, 4.5 to 

 4.75 mm. 



Color: Quite uniformly greenish to yellowish in color. Elytra quite 

 hyaline, showing clearly the dark nervures of the under wings. 



External genitalia: Female, last ventral segment little over twice as 

 broad as long, lateral margins rounding, posterior margins truncate or 

 slightly sinuate to two very small median lobes, separated by suggestion 

 of a median notch ; ovipositor exceeding pygof ers by nearly one-third their 

 length. Male, last ventral segment short, very wide median excision 

 bearing distinct, acutely pointed lobe; valves long and narrow, but not 

 exceeding the long pygof ers ; male antennal disc small and nearly circular. 



Internal male genitalia: Styles with very small basal portion, even 

 smaller than in verticis; connective of same type as in verticis except 

 that dorsal portion is more slender; cedagus like that of verticis except 

 for the small pair of retrorse processes near the tip. 



Distribution: Taken in Crawford, Douglas, Riley and 

 Ottawa counties. 

 Hosts: Willows. 



Genus BYTHOSCOPUS Germ. 



To this genus belong short, stout species, with the head nar- 

 rower than the prothorax, the anterior margin of which is not 

 produced beyond the anterior margin of the eyes. The vertex 

 is short, often with the margins nearly parallel, but frequently 

 much longer on the median line than next the eyes. The pro- 

 notum is large, with very distinct, parallel, transverse stria- 

 tions. The elytra are subcoriaceous, short, deeply punctured, 

 and with the punctures bearing short hairs. 



Only one species of this genus has been recorded from Kan- 

 sas, but it is probable that the following two occur. 



KEY TO SPECIES. 



A. Size 5.75 mm. or over, more slender forms. laetus. 



AA. Size 5 mm. or less, short, broad forms. apicalis. 



