A STUDY OF THE GENUS MONOXIA — BLAKE 167 



dense, shallow, and obscured by the short, dense pubescence; disk 

 depressed in middle and at sides ; usually entirely pale but sometimes 

 with a reddish-brown M -shaped marking. Elytra with a long intra- 

 humeral sulcus extending well down the elytra ; punctation moderately 

 coarse, dense, and deep, and not obscured hj the short, pale and not 

 very dense pubescence; elytra sometimes entirely pale or with traces 

 of the typical interrupted subsutural vittae, often with other scattered 

 pale brown spots, and occasionally heavily marked. Body beneath 

 and legs usually pale, densely pubescent. Claws in both sexes toothed. 

 Length, 3.6 to 4 mm.; width, 1.6 to 1.8 mm. 



Type, female, and 4 paratypes (2 males and 2 females), U. S. N. M. 

 No. 44023, collected by R. C. Shannon. 



Type locality. — Ritzville, Wash. 



Distribution. — Washington (Ritzville); Oregon (La Grande, Echo, 

 Crater Lake Park, Silver Lake, Klamath County) ; Cahfornia (Facht, 

 Lassen County) ; Idaho (Stanley, Atlanta); Colorado (Logan County). 



Food plants. — Sugar beet (E. S. G. Titus); Chrysothamnus (E. A. 

 Scullen). 



Remarks. — ^Although this species is unquestionably closely related 

 to others of the genus, it differs from most of them by having the 

 claws of both sexes toothed. The only other species of the genus hav- 

 ing this peculiarity are three belonging to the sordida group. M. 

 schizonycha is not related to this group but closely resembles consputa. 

 It is a httle slenderer and the punctation is a little deeper and coarser 

 than in consputa, and the elytral depressions not so pronounced. 

 The punctation is not so shallow and nearly obsolete as in puherula 

 but distinct, and the elytral pubescence is a little longer. 



MONOXIA OBESULA, new species 



Plate 19. Figure 12 



Small (about 3 mm.), robust, covered with dense pubescence, the 

 prothorax and elytra not depressed, pale yellow with few elytral 

 markings, metastemum usually dark; elytra distinctly punctate. 

 Head pale, deeper in coloring on the occiput, labrum and median line 

 dark; pubescence dense, hiding punctation. Antennae with sUghtly 

 darker outer joints. Prothorax considerably less than twice as broad 

 as long, the sides arcuate and with a distinct basal tooth; disk little 

 depressed in middle or on sides ; usually entirely pale and covered with 

 dense pubescence hiding the punctation. Elytra broadly oblong, 

 convex, with sUght intrahumeral sulcus; punctation dense, shallow 

 and partially concealed by the fine pale pubescence ; elytra sometimes 

 entirely pale, usually with small spots forming traces of a subsutural 

 vitta, and often other spots scattered on the sides. Body beneath 

 densely pubescent; mesostemum and metastemum dark, sometimes 



