224 IOWA ACADEMY OF SCIENCES. 



Vertex nearly flat, one-half wider than long, shorter tjhan pronotum, 

 obtusely angled before, margin obtuse; front one-third longer than wide, 

 width on clypeus more than half that at ocelli; clypeus narrow, nearly 

 parallel margined; lorse large, wider than clypeus; pronotum more than 

 three times wider than long, obtusely rounding before; side margins, one- 

 half the length of the eyes; elytra occurring in two lengths, a short form 

 in which the apical cells are minute, reaching only to the penultimate seg- 

 ment, this usually associated with rudimentary wings, the long-winged 

 form with fully developed apical ceils elytra exceeding the abdomen ar.d 

 associated with fully developed wings; venation simple, inner branch of 

 first sector forked near its middle, making one more anteapical cell than 

 in comma; four terminal and two costal cells. 



Color: Clear, creamy white with testaceous and black markings as fol- 

 lows: Pour quadrate spots on the anterior margin of vertex, the outer pair 

 between the eyes and ocelli, two large round spots near the base of the 

 vertex and a smaller irregular pair on the disk midway between these and 

 the inner marginal pair, black; a small black spot under the base of the 

 antennffi, four equidistant dark brown or black stripes on the pronotum, the 

 inner pair extending across the scutellum; a small dash behind the eye and 

 a stripe just under the lateral margin of pronotum, black; elytra with eight 

 brown stripes, a complete longitudinal stripe just outside the first sec';or 

 and another next the claval suture, a narrow stripe between the branches 

 of the first sector, a shorter one between branches of its inner fork, a broadly 

 interrupted one between the first and second sectors, a complete median 

 stripe on the clavus, one on the outer, apical half and another on the inner, 

 basal half. The apical cells and the apax of ttie anteapicals, fuscous mar- 

 o-ined. Tergum with four black lines posteriorly; pygofers with two round 

 black spots above; connexivum broadly margined <m the outside, narrowly 

 on the inside, with black; legs lined and spotted with black. 



Genitalia: Ultimate ventral segment of the female with the posterior 

 margin angularly excavated; apex of excavation truncate, sharply notched, 

 black; lateral angles acute; male valve narrow, apex rounding, one-half 

 longer than the ultimate segment; plates slightly broader than valve at 

 base, narrowing to the middle, then parallel margined to the broad trun- 

 cate apex, twice the length of the value, equaling the pygofers; pygofers 

 with the side margins compressed below, an oblique black mark just back 

 of the margin beneath. Described from numerous specimens collected at 

 Ames, Iowa. 



Readily separated from comma by the additional fork of the 

 first sector, the spots on the disk of the vertex and the number 

 of stripes on the elytra. Superficially it so closely resembles 

 that species that hitherto specimens have been confused with 

 those of that species. 



Larvae very broad, stout forms; head large, resembling the adult; ver- 

 tex slightly more pointed; color creamy white, with four brov.-n stripes as 

 follows: An inner parallel pair arising from distinct spots on the apical 

 margin of the vertex and extending to the tip of the abdomen on either 

 side, a pair just inside the margin of the body arising behind the eyes and 

 terminating before the last abdominal segment. 



