THYCE AND POLYPHYLLA 331 



coarsely and deeply punctate, the punctures well separated and 

 bearing very slender scales, which become dense and more erect 

 apically; apex broadly, feebly arcuate, the angles very obtuse, the 

 sides straight; antennal club pale yellow-brown; prothorax twice 

 as wide as the median length, the sides broadly and moderately 

 subangulate at the middle; surface very shining, pallescent near the 

 sides, the punctures relatively very large, coarser than in any other 

 species, moderately deep, very remotely and irregularly scattered, 

 smaller and much closer toward the sides, each with a narrow scale- 

 like hair, the depressed median line and a medial dash at lateral 

 fourth having dense and more dilated scales; erect hairs rather long 

 but very sparse throughout; scutellum broadly squamose medially 

 and with scattered scales elsewhere basally; elytra coarsely rugose 

 and finely, sparsely, very irregularly punctate, two-fifths longer than 

 wide and two-fifths wider than the prothorax, the suture, contrary 

 to the general rule, without denser scales except posteriorly, the 

 alternating discal lines of denser scales very narrow and inconstant, 

 the outer wholly wanting in the type; pygidium with small scales, 

 very dense basally, less dense and irregular elsewhere and with a 

 narrow glabrous median line except basally; abdomen densely squa- 

 mose, sparsely toward the bases of the segments; tarsi unusually 

 short, the intermediate scarcely two-thirds as long as the tibiae. 

 Length 23.7 mm.; width 10.6 mm. New Mexico. A single specimen 

 (received from an unrecorded source) adusta n. sp. 



Last palpal joint more slender, less obtuse and subdeflexed at apex, 

 always more than twice as long as wide; pronotal punctures strong 

 but less coarse and less sparse than in adusta 13 



13 Body rather elongate and subcylindric, with sparse yellowish-white 

 vestiture, shining; vertex strongly and closely punctate, with long 

 close erect pale brown hairs and, toward the eyes, rather dense whitish 

 scales; clypeus strongly reflexed apically, with close-set punctures, 

 distinctly smaller than those of the head, each bearing a scale-like 

 hair, becoming very dense and pubiform apically, the outline as in 

 opposita; last palpal joint two and one-half times as long as wide, the 

 outer surface convex, barely at all flattened, though with an undefined 

 asperulate area; prothorax in form nearly as in the preceding but 

 broader, with the punctures nearly as coarse but much closer, in 

 fact at certain parts rather dense, the subdecumbent short stout 

 hairs very sparse, the long erect hairs much more numerous; im- 

 pressed median line and a sublateral oblique vitta in basal half 

 only having dense whitish scales; elytra two-fifths longer than 

 wide and a fourth wider than the prothorax, the surface rather 

 intricately rugose and punctured, less coarsely and much more 

 closely than in the preceding; suture with dense scales, sometimes 

 becoming much less dense basally; three discal lines of dense squamae 

 generally distinct and entire but fine and ragged; vestiture of the 

 intervals sparse, composed of short stout hairs,lslightly morej-ellowish 

 than the denser lines; pygidium densely clothed with small stout 

 hairs, becoming sparse laterally and apically but without trace of a 

 definite glabrous median line; abdomen sparsely squamulose, densely 



