OSfeORN AND BALL STUDIES OF NORTH AMERICAN JASSOIDEA. 95 



inflated at the base, then compressed to the acute edge, equalling the 

 plates. 



Described from four females and two males swept from Sporobolus, 

 Little Rock, Iowa, July ist, and one female taken at Ames, Iowa, 

 August 9th, and two females from Colorado through the kindness of 

 Prof. Gillette. 



Athysanus dentatus n. sp. 



Size oi pinutatus, nearly, stouter, vertex nearly flat, wings covering 

 the tip of the ovipositor, light testaceous, two dark spots on the scutel- 

 lum and two wavy transverse lines on the head. Length, 2. 75—3 mm ; 

 widih, over i mm. 



$, vertex one-fifth wider than long, obtusely angled before, disc flat, 

 anterior margin rounding; front long and rather narrow, the sides 

 straight, slightly narrowing; clypeus slightly broadest at base, little 

 longer than broad, narrower than apex of front; loras broader than 

 clypeus, angled internally ; genae, margin straight either side the dis- 

 tinct angles. Pronotum more than twice broader than long, obtusely 

 rounding before, the posterior margin nearly straight, humeral margin 

 rounding nearly to the eye. Elytra not quite twice longer than wide, 

 their rounding tips inclined to be flaring, without an appendix, never 

 overlapping. Venation of the normal Athysanus type, the apical cells 

 nearly square. 



Color : Obscure yellowish or reddish-brown, vertex lemon-yellow, 

 an irregular brownish line bordering an X-shaped figure as follows : 

 commencing just before the back margin against either eye running in 

 one-third the distance to the center, then throwing a looj) forward 

 one-third the distance to the ocelli, between these loops margining a 

 perfect X resting on the posterior margin of the vertex, the separation 

 of its bases being a black median line ; another wavy line on the 

 anterior margin connecting six dots as follows : one on either side of 

 the tip, and a pair on either side of these, dividing the distance to the 

 eyes on a line slightly above the ocelli; face yellow, sutures, apical 

 portion of clypeus and the tips of the lorae strongly marked with brovvn, 

 front with a broad median line widest below, and about eight lateral 

 arcs, the upper pair very strongly arched above, second pair reduced 

 to spots beneath the arches. Pronotum testaceous on the disc, anterior 

 margin yellowish, behind which there are a few brownish spots, of 

 which the inner pair is the most distinct ; scutellum soiled yellow. 



