H. C. FALL 359 



Head slightly convex, the darker areas, especially the median line, thickly 

 punctate, elsewhere sparsely so. Eyes ( 9 ) separated by a distance equal to 

 the length of the basal two joints of the antennae, or by about three-fourths 

 the vertical width of the upper lobe of the eye. Antennae ( 9 ) about half the 

 length of the body, pale yellow, outer joints dusky, tenth joint three times as 

 long as wide. 



Prothorax fully one-half wider than long, moderately narrowed in front, sides 

 arcuate posteriorly, feebly incurved at base; surface thickly punctate in 

 numerous small semi-detached brown spots which combined make up the 

 standard M; elsewhere sparsely punctate, the side margins rather widely 

 smooth. 



Elytra coarsely brown punctured, the punctm-es arranged in moderately 

 impressed more or less regular lines posteriorly, but much broken anteriorly 

 except the eighth and perhaps the second and third striae, which are entire; 

 completely confused in the scutellar region; eighth stria with sigmoid disloca- 

 tion behind the humerus; marginal interspace without or with a few coarse 

 punctures near the interruption; shield moderate. 



Pygidiimi yellow, basal margin with large median spur and a small spot on 

 each side, fuscous; body beneath more or less brown, the margins paler. Legs 

 yellow, femoral spots small, pale brown; front claws sUghtly larger than the 

 others in the female and presumably very distinctly so in the male. 



Length 4 to 4.3 mm.; width 2.15 to 2.3.5 mm. 



Distribution . — Utah: St. George (Wickliam), type 9 in Bowditch Coll. 

 Arizona: Bill Williams Fork (Snow); Yuma, Apr. 22 (Fenyes). 



Three examples are before me, all females. In the Bill Wil- 

 liams Fork example, there are small but quite distinct lateral 

 elytral spots, the middle spot faintly indicated. The eyes are 

 quite narrowly separated in the female and in the male will 

 without doubt be found still more approximate. There are in 

 the material before me two males, one from Arizona, the other 

 without any locality but unquestionably of the same species, 

 which agree so well in all essentials with the above females that 

 I am provisionally placing them together. At first glance they 

 differ so notably by their more elongate form, that the name 

 longus would seem to apply much better than crassus; however, 

 sexual differences in the robustness of body are often quite marked 

 and need occasion no surprise. The punctures are a little denser 

 in the dark areas of the pronotum and seem slightly coarser on 

 the elytra and of deeper tint generally — fuscous in one of the two 

 examples. The eyes are separated by about three-fourths the 

 length of the basal antennal joint; the front claws are moderately 

 strongly enlarged; the terminal joint of the maxillary palpus is 

 broadly truncate, in fact not at all narrowed apically. 



TRAXS. .\M. EXT. .SOC, XLI. 



