OSBORN AND BALL STUDIES OF NORTH AMERICAN JASSOIDEA. 93 



scutellum and three pairs of oblique ones on the elytra. Length 5 

 mm., width 1.75 mm. 



$ vertex narrower than in colon ; length equalling three-fourths the 

 width, side margins parallel, one-eighth longer at middle than at eye, 

 disc flat, a straight transverse impression before tip, acutely angled 

 with face, front broader than in colon, margins gradually roundingly 

 narrowing to the parallel-margined clypeus, outer angles of gense 

 rounding, margin below nearly straight. Pronotum half longer than 

 vertex, posterior margin long, humeral margin short and strongly 

 oblique, lateral margin rather long, somewhat thickened, anterior 

 margin more produced than in comma or in colon. Elytra three times 

 longer than wide, the margins nearly parallel, venation indistinct near 

 base, strong at the apex, pattern similar to the macropterous form of 

 colon slightly irregular in the anteapicaj cells, outer anteapical cell very 

 long, narrow, somewhat curved, at least three-fourths of its length 

 projecting beyond the apex of clavus, central anteapical still longer, 

 curved, constricted in the middle, sometimes divided, inner anteapical 

 not extending much beyond clavus, inner apical margin oblique, first 

 apical cell elongate, narrowly margining the costa ; second, length 

 and breadth nearly equal, set obliquely against the outer corner, the 

 margining nervures curved, parallel. 



Color: Pale yellow, a narrow line on the anterior margin of the 

 vertex, a spot either side of the tip, a curved mark on the costal mar- 

 gin of elytra behind the middle, a spot on the second apical, and the 

 posterior margin of the central anteapical cell black, two broad stripes 

 parallel across vertex, pronotum and scutellum, and three pair on the 

 elytra parallel with the claval suture, the inner pair continuous with 

 those from the scutellum, bright red ; face dark brown, the sutures and 

 outer margin of the gens light-yellow, a black spot on the genae above 

 the lorae ; legs pale, lined inteinally with black; tergum black on disc, 

 margins yellow, penultimate segment yellow with a black median line, 

 ultimate one with a median and two lateral lines black, pygofers yel- 

 low with a small black spot above. 



Genitalia: ?, ultimate segment with the lateral margins suddenly 

 narrowed from near the base, then roundingly produced, the posterior 

 margin with three obtusely-rounding lobes, produced part of nearly 

 equal length and breadth; from under the emarginate angles arise two 

 lateral membranes, resembling acutely produced lateral angles to the 

 segment. 



Described from six examples from Texas (Aaron). 



[ Proc. D. a. N. S., Vol.. VII.] 12 [January 14, 1898.] 



