2 38 The Ohio Naturalist. [Vol. II, No. 6, 



Vertex slightly obtusely angled, twice as long on middle as against the 

 eye, as long as the pronotum, posterior margin nearly straight, transversely 

 convex, acutely angled with front, the anterior margin blunt. Front wider 

 at base than its median length, rounding below to the clypeus. Elytra 

 broad, broadly rounding, almost truncate behind, exposing the pygofers and 

 last abdominal segment in the brachypterous female ; reaching just to the 

 tip of the plates in the macropterous male, exposing the two style-like pro- 

 cesses. Venation distinct, typical Athysanoid or not infrequently with a 

 second cross nervure between the sectors and a few irregular ones on clavus ; 

 apical and anteapical cells broad and short, central anteapical with the 

 margins nearly parallel. 



Color : vertex pale yellow, a light line between the ocelli and another 

 along the margin to the apex on each side, forming a triangle which encloses 

 a pair of triangular, dark spots. Back of this triangle are two broad, slightly 

 irregular spots and another pair occupy the basal angles. Elytra with the 

 nervures light, distinct, more or less margined with fuscous. Face pale, the 

 sutures dark ; tips of the lorae, a pair of lines on the clypeus and about nine 

 arcs on the front, black. 



Genitalia : female segment nearly twice the length of the preceding, trun- 

 cate on its middle half, the lateral angles acutely triangularly produced, 

 usually clasping around pygofers ; male valve obtusely triangular, equaling 

 the ultimate segment in length and nearly in width ; plates as wide as the 

 segment, roundingly divergent to the parallel lateral margins, three times 

 the length of valve, pygofers compressed beneath the plates, their st3-le-like 

 tips extending beyond them the length of the plates. 



Habitat: Canada, N. Y., N. H., Conn., Mich., Iowa, Kans. 

 and Colo. The very distinct genitalia of either sex will readily 

 separate this species. 



ATHYSANUS ALPINUS BALL. 



Alh\:\anH.s alpimn- Ball. Ent. Xews. X, p. 173. 1S99. 



Resembling obsoletns in size and color, with the long vertex of exlriisus. 

 Straw yellow marked with fuscous, two transverse bands on vertex, angled 

 forward in the middle. Length, 9 5 5 "ini., $ 4.5 m.; width 2 mm. 



Vertex as long as the pronotum, slightly obtusely angled, the margins 

 rounding, front as in exlnisus, the clypeus slightly narrowed towards the 

 apex. Elytra reaching the middle of the last abdominal segment in the 

 female, slightly longer than the abdomen in the male ; venation rather weak 

 and irregular, Athysanoid, the anteapical cells parallel margined. 



Color : vertex pale straw, a transverse, black band arising just back of the 

 ocelli, its anterior margin angling forward nearly parallel with vertex mar- 

 gin, its po.sterior margin rounding and paralleled by another le.ss definite 

 band on the disc, usually a pair of irregular .spots in the basal angles. Pro- 

 notum pale, sometimes with four irregular, longitudinal stripes which do 

 not reach the anterior margin. Elytra pale yellow, with the nervures light, 

 some fuscous blotches, especially in the apical cells in the male. Face pale. 



