88 STUDIES IN NORTH AMERICAN MEMBRACID7E 



peus and lorse large, well distinguished with blackish sutures, the former 

 rather broad, parallel and distinctly exceeding the lone and cheeks; rounded 

 at apex. Color of dark examples deep piceous brown with the characteristic 

 markings strongly distinguished. Pronotum anteriorly whitish irrorated 

 and varied with dark brown; anterior white vitta less oblique than in vau ; 

 broad below, a little sinuated above; median dorsal spot oblong or nearly 

 square, parallel with the posterior vitta and approaching the angle of the 

 anterior vitta. Elytra subhyaline or somewhat infuscated, base and apex 

 deep smoky brown the apical spot oblong and nearly covering the terminal 

 areole. The anterior whitish vitta of the pronotum is continued across the 

 elytra as an obscure whitish cloud which is made more distinct by the white 

 base of the tergum beneath. I/Ower surface pale with black marks under 

 the margins of the face. This black color may be spread over most of the 

 lower surface of the thorax and on the femora. In pale examples the color 

 of the pronotnm is ferruginous brown deepened to fuscous along the borders 

 of the white vittse. 



Described from four females taken by me at Manitou, 

 Colorado, in July 1900. These were taken in company with 

 acutus from which they may be readily distinguished by the 

 broad rounded clypeus. They are still nearer van but the 

 oblique anterior vitta when viewed from above forms a more 

 obtuse angle where it meets the dorsal carina. The stronger 

 colors and maculated elytra may also assist in distinguishing it. 



12. Cyrtolobus acutus n. sp. PI. 2, fig. 21. 



Aspect of vau but easily distinguished by the very slender and acute 

 clypeus. Female: longer and more slender posteriori}' than vati, the apex 

 of the pronotum decurved and generally attaining the apex of the elytral 

 areoles; the posterior sinus distinct; crest elevated about as in vau but this 

 character is subject to variation in both species. Face coarsely punctured, 

 uneven, apical margins of the cheeks distinctly sinuated; middle line of the 

 clypeus strongly obtusely carinated, this carina produced considerably be- 

 yond the line of the lorse as a slender subacute point. Color a clear ferru- 

 ginous brown; anterior oblique vitta entire; almost straight, well distin- 

 guished; surface before this line pale, punctured with ferruginous on the 

 metopidium; ornamented above the inner angle of the eye with an oval fer- 

 ruginous spot bordered with pale and a ferruginous cloud lies along the an- 

 terior oblique pale vitta; dorsal carina fuscous on the metopidium; median 

 white dorsal spot squarish, longer than broad and directed a little backward 

 away from the anterior vitta; posterior vitta running downward and a little 

 forward to the margin but not meeting the anterior vitta. Elytra hyaline, 

 the apical smoky cloud narrow, scarcely encroaching upon the apical are- 

 oles. Beneath paler brown, the abdomen whitish. 



Male: smaller with the pronotum less elevated and shorter, not attain- 

 ing the base of the terminal areole, not at all decurved. Color dark 

 piceous brown or almost black; the white bands and median spot as in the 



