48 IOWA ACADEMY OF SCIENCES. 



in hand, but his references of iclifhyocephala Sign, to tliis 

 form seems doubtful. 



•^ HoMALODiscA LiTURATA N. sp. Plate II, Fig. 2. 



Smaller, narrower than triquetra with a longer head.. 

 Straw yellow, five irregular brown lines on the head. 

 Length, 11mm; width, 2.25mm. 



Vertex one-fifth longer than its basal width, half longer than 

 the pronotuna, disc flat, very deeply grooved in the middle. Front 

 very long and narrow, disc flat and in same plane as the clypeus. 

 Pronotum short, disc flat, posterior margin more strongly curved 

 than the anterior one. Elytra very narrow, nervures distinct, a 

 single cross nervure between the sectors situated at over one-third 

 the distance from the fork of the first sector to the base. 



Color; vertex pale yellow with five brown lines as follows: a 

 narrow median one expanded on the apex, an interrupted line ou 

 either side the middle, arising considerably back of the apex and 

 usually somewhat reticulate anteriorly, a pair of heavier stripes 

 arising either side the apex and running back to the ocelli, their 

 basal portions forming part of the loop that runs from the ocelli 

 around to the eye, the striations of the reflexed part of the front 

 brown. Pronotum yellow, irregularly punctured with brown; 

 usually four distinct dark spots on the anterior submargin. Scutel- 

 lum yellow with large brown spots sometimes arranged in the form 

 of an H. Elytra hyaline, the nervures red, an irregular opaque red 

 patch on the costal half back of the middle, terminating just 

 before the apical cells and omitting an oval hyaiin spot in the 

 anterior end of the anteapical cells. Face and legs yellow, a spot 

 on apex of front and anterior tibiae, fuscous. Abdomen black 

 above, the terminal segment yellow, the lateral margins broadly 

 white, at the base, narrowing apically, the spiracles dark. Below 

 pale, sometimes a median line and the margins of the female seg- 

 ment black. 



Genitalia; female segment half longer than the penultimate, the 

 lateral margins parallel, the posterior margin in two slightly 

 rounding divergent lobes, the Jiotch between them narrow and less 

 than half the depth of th&f'ifr trigueira. 



Specimens are at hand from Phoenix, Ariz; Yuma, Cal- 

 ifornia, and Comondu Lower, Calif, Mexico. The larger 

 head and much narrower form together with the lineate 

 arrangement of the markings will readily separate this- 

 form ivoviPtriquetra. 



