112 THE UNIVERSITY SCIENCE BULLETIN. 



Genus Nionia Ball. 

 In this genus the vertex is very short, produced medially 

 till twice as long as next the eye. Ocelli distant from eyes. 

 Pronotum long, anterior margin produced beyond anterior 

 margin of eyes, posterior margin emarginated medially, 

 coarsely punctured. Elytra moderately long, slightly exceed- 

 ing abdomen, veins margined with lines of coarse deep punc- 

 tures. 



Nionia palmeri (Van D.). 



Gonxaynathus palmeri Van D., Can. Ent., xxiii, p. 171, 1891. 



eoniagnathus palmeri Osb., 20th Rept. N. Y. St. Ent., p. 529, 1905. 



Goniagnalhus palmeri Osb., Ohio Nat., v, p. 274, 1905. 



Nionia palmeri Ball, Proc. Biol. Soc. Wash., x.xviii, p. 166, 1915. 



Goniagnalhus palmeri DeL., Tenn. St. Bd. Ent., Bui. 17, p. 33, 1916. 



Nionia palmeri Van D., Cat. Hemip. N. A., p. 622, 1917. 



Nionia palmeri Lathr., S. C. Agr. Exp. Sta., Bui. 199, p. 46, 1919. 



Form: Much like a Macropsis in general appearance but stouter. 

 Length, 4 mm. Vertex very short except medially where it is produced 

 till twice as long as next the eye. Pronotum with anterior margin 

 greatly produced, reaching far beyond anterior margin of eyes, lateral 

 margins practically none, posterior margin emarginate. Scutellum large, 

 about as long as wide, punctate. Elytra broad and moderately long, 

 nervures margined with coarse punctures. 



Color: Shining black except for brownish apices of elytra, antennae 

 and tarsi. 



External genitalia : Female, last ventral segment twice as long as pre- 

 ceding, posterior margin slightly produced medially; pygofers broad and 

 short, exceeded by the ovipositor. Male, valve covered by last ventral 

 segment, plates tapering to acute apices. 



Distribution: Reported from Cherokee, Pottawatomie and 

 Riley counties. 



Hosts: Definite host unknown. 



Tribe JASSINI (Dohrn). 



This is a very heterogeneous tribe, but all its members have 

 the ocelli on the margin of the vertex near the eyes, and the 

 nervures of the elytra branch on the disc. 



Of the 34 genera of the tribe known to occur in America 

 north of Mexico, we have 24 genera in Kansas. 



KEY TO GENERA. 



A. Head flattened, anterior margin thin, sharp, or foliaceous. 

 B. Head, at least in female, strongly foliaceous. 



C. Head about twice as long as width across the eyes; head 

 of both male and female foliaceous. Dorycephalus 

 CC. Head about as long as width across the eyes; head of 

 male distinctly less foliaceous than head of female. 



