142 Annals Efitomological Society of America [Vol. XV, 



duced lower angle which is cun-ed down like the beak of a raptorial 

 bird, the extremity triangular. Front broad and nearly parallel, the 

 lateral carinse widening toward the apex. Median carina of vertex 

 extending the full length of the cephalic process. Central tablet of 

 pronotum distinct. A definite oval or slightly oblique callosity behind 

 the eye, separating it from the pronotum. The elytra brachypterous, 

 irregularly reticulate. Legs simple; hind tibia with 7 strong spines. 



Type of the genus Orgamara bi punctata Ball. 



This group is distributed from southern Idaho to Mexico 

 between the Wasatch and Sierra Nevada Mountains and 

 extending across the latter range in Southern California. All 

 the species of this group have been taken from sage brush 

 regions and most of them have been beaten directly from 

 species of Artemesia. 



Key to the Species of Deserta. 



A. Part of the front above the center of the eyes twice as long as that below. 

 B. Cephalic process as seen from above extending beyond eye less than 

 twice the length of the eye. Lower angle of anal tube of male more 

 than one and one-half times the dorsal length of the tube, broadly 

 expanded and curved down to meet the long, narrow plates. 



obscnra Ball 

 BB. Cephalic process more than twice as long as the eye. Lower angle of 



anal tube of male narrower and less produced bipiinctata Ball 



AA. Part of the front above the center of the eyes equalling that below. 



obesa Ball 



Deserta obscura Ball. 

 (Plate XII, Figs. 4, 11.) 

 Orgamara obscura Ball. Proc. Bio. Soc. Wash., Vol. XXII, p. 200, Dec, 1909. 



Resembling bipiinctata, darker with a shorter cephalic 

 process. Length, females, 6 mm. ; males, 5 mm. Ashy gray 

 with a curved and slightly hooked process. 



Cephalic process shorter and stouter than in bipiinctata. Front 

 with the median tablet expanded before the apex, rounding above. 

 Part above the center of the eyes one-half longer than that below. 

 Color — white, finely sprinkled with dark points, giving the insect an 

 ashy gray appearance. Front greenish, the clypeus rusty orange. 



Genitalia. — Lower half of anal tube in the male extended over one 

 and one-half times the median length of the tube, broadly expanded 

 and curved down to meet the margins of the long, narrow plates. 

 Surface of the lower half furrowed and covered with coarse hairs. 



This species has been taken on sage brush {Artemesia 

 tridentata) at Nampa, Idaho, ' Wells, Nevada, Marysvale and 

 Chadburn's, Utah, and Doyle and Chilcoot, California. Collec- 

 tions have been made all around this area, without finding the 



