DYNASTIN^E 225 



wider than long, acutely ogival; elytra a fifth or sixth longer than 

 wide, parallel, barely at all inflated behind, broadly and circularly 

 rounded at apex, a fifth or sixth wider than the prothorax and not 

 quite twice as long, the stride coarse and impressed, including large 

 and very shallow, close-set annular punctures, confused externally 

 and closer apically, the alternate intervals only partially punctate; 

 pygidium shining, very minutely, sparsely punctulate, becoming 

 closely subrugulose only at the lateral ends, the lower beading thick 

 and entire; hind tarsi stout, much shorter than the tibiae, the basal 

 joint and, to some extent, the second, obliquely produced externally. 

 Female nearly like the male though rather more elongate, the clypeus 

 less transverse, the tubercle less elevated or abrupt; pronotum with- 

 out impression, the tubercle represented only by a minute angulate 

 posterior enlargement of the apical beading, the punctures anteriorly 

 less coarse, though strong and more or less confluent antero-laterad; 

 elytra similar but about a fourth wider than the prothorax and twice 

 as long; pygidium nearly as in the male but still more completely 

 sculptureless; abdomen punctured only near the sides. Length 

 (6 cJ\ 7 9) 22.5-27.0 mm.; width 12.8-15.7 mm - New Mexico 

 (Albuquerque) and Texas (El Paso). Not uncommon. 



ponderosus n. sp. 



Apical pronotal impression (cf) much smaller, only a fourth to barely a 

 third the total width and much less than half the entire length; 

 body narrower and smaller in size 2 



2 Hind tarsi rather stout and moderately developed as usual; elytra 

 always distinctly elongate and not or scarcely inflated posteriorly. .3 



Hind tarsi notably small and slender; elytra but little longer than wide, 

 inflated at apex and there much more conspicuously exceeding the 

 prothorax in width 4 



3 Body much narrower and more elongate, very feebly inflated pos- 

 teriorly, not very shining, castaneous, the anterior parts more black- 

 ish, the under surface obscure castaneous; head fully a third as 

 wide as the prothorax, finely and densely rugulose, the tubercle 

 abrupt, the subapical carina broadly bilobed; prothorax shorter, 

 more than one-half wider than long, the sides broadly and 

 feebly rounded, more strongly and more rapidly converging ante- 

 riorly, slightly oblique at base, the basal angles very obtuse and 

 moderately rounded, the bead thick and entire; tubercle moderate, 

 rather broad, the impression small and very feebly impressed, in- 

 definitely limited, about a fourth the total width and not a third the 

 length, the bottom impunctate but dull; punctures elsewhere an- 

 teriorly coarse, very rugosely confluent, less coarse and confluent 

 at the sides, very fine, feeble and sparse discally; scutellum ogival, 

 with strongly arcuate sides and a short canaliculation at apex in the 

 type; elytra longer than usual, a fourth or fifth longer than wide, a 

 sixth wider than the prothorax and much more than twice as long, 

 sculptured nearly as in snowi, the pygidium nearly similar but with 

 the coarse gutter at the middle of the apex much more abruptly 

 formed, not continued laterally as it is in that species and with the 

 T. L. Casey, Mem. Col. VI, Oct. 1915. 



