146 Annals Entomological Society of America [Vol. XV, 



Orgerius minor Ball. 

 (Plate XII, Figs. 1, 6, 9.) 

 Orgerius minor Ball. Proc. Bio. Soc. Wash., Vol. XXII, p. 202, Dec, 1909. 



Resembling rhyparus but smaller, paler, with a shorter, broader 

 vertex, two-thirds as wide as long, the foliaceous margins rounding into 

 the blunt apex. Posterior tibia normal. Length 4.5 mm. 



This species occurs in the desert region of southwestern 

 Colorado and southern Utah, where it is found on the ground 

 usually associated with some of the smaller salt bushes {A triplex 

 spp.). 



Acinaca nov. gen. 



Resembling Yucanda in structure, but with a very much 

 smaller, shorter and more compressed cephalic process. 



Cephalic process moderately long, strongly compressed, narrowing 

 toward the apex; as seen from the side, flat and widens rapidly to a 

 slightly rounding truncate apex, curving upwards, strongly inclined, 

 much wider at apex than at base. The vertex is narrow, less than the 

 width of the eye. The lateral carina of the face cuts the dorsum at one- 

 third the distance to the apex. Median carina faint or wanting. Central 

 tablet of front narrow, almost linear, tricarinate. No callosity behind 

 eye, eye and pronotum widely separated. Pronotum very small, nar- 

 row, pustulate, the lateral extensions only represented by a narrow 

 collar, a median but no lateral carinae, without a raised central tablet. 

 Scutellum very small, with a single carina. Elytra brachypterous irreg- 

 ularly reticulate. Pustules on abdominal segments large, prominent 

 and extending only half way to the median line. Rostrum equalling the 

 abdomen in length. 



Type of the genus Acinaca lurida sp. nov. 

 This genus may be distinguished from any other of the 

 group by its simiter-shaped cephalic process. 



Acinaca lurida sp. nov. 

 (Plate XII, Figs. 8, 10.) 



A small, globose, highly ornamented green and brown 

 species with a compressed cephalic process. Length, females, 

 3 mm. ; males, 2.5 mm. 



Cephalic process slightly longer than the eye, roundingly truncate; 

 its tip about five times as deep as wide. Vertex a narrow, slightly 

 widening strip between the large round eyes. Dorsum of cephalic 

 process long, triangular, equalling the vertex, inclined upwards at an 

 angle of 45°. Front elongate, widening below the eyes which are slightly 

 above the middle. Frontal tablet very narrow, almost linear, strongly 



