222 IOWA ACADEMY OP SCIENCES. 



ATHYSANUS BICOLOR VAN D. 



Canadian Entomologist, XXIV, p. 114, 1892. 



This species was described from Kansas and Mississippi, and 

 had been reported from Iowa under the name virgulatus Uhl 

 (a MSS. name). The adults have nearly the same form and 

 size as the preceding species; the vertex is more pointed and 

 the attenuate ovipositor extends beyond the elytra. 



In color the females are yellowish green, with two large 

 coalescent spots on the vertex, both margins of the pronotum, 

 the entire claval suture and the tip of the wing black; below, 

 all light. The males have the whole point of the vertex the 

 sutural margin and an oblique band from the anal cell to the 

 center of the costal margin black. Bslow all black except a 

 band across the middle of the face. It can ba readily separated 

 from curtisii by the absence of the Y on the face, and the fact 

 that the yellowish- green of the elytra is net confined to the 

 nerves. 



The larvae are very light yellow, sometimes almost white, 

 and the hairs are much smaller and finer than those of curtisii, 

 which, otherwise, they closely resemble. They were first taken 

 June 16th, when the first adults of a brood were issuing; larva? 

 remaining abundant until the end of the month. The adults 

 were very thick until well into July, disappearing before the 

 end; appearing again toward the end of August and through 

 September. They were thickest upon a patch of Andropogon sco- 

 parius, where it was nearly free from other grasses. 



ATHYSANUS OBTUTUS VAN D. 

 (Plate xxl, Fig. 3 ) 

 Canadian Eutomologist, XXIV, pp. 115, 156, 1893. 



This species was described from Mississippi, and has been 

 received from Kansas and taken at Ames prior to this season. 

 The adults have almost exactly the form and size of bicolor, but 

 are readily distinguished by their culor. The vertex is lemon 

 yellow, with two round spots just before the middle, and tw j 

 small, oblique dashes near the base, darker. The remainder of 

 the body is testaceous. Apical cells of the elytra hyaline, 

 enclosing veinlets dark. 



The larv8D are light yellow when small, but gradually darken 

 to a chocolate brown in pupa, when they resemble the adu.ts m 

 form. The adults have been taken the last week in April, 

 rather commonly, indicating an adult hibernation, the larvfB 

 appearing in May, maturing the midale of June; the adulis 



