308 MEMOIRS ON THE COLEOPTERA 



Anterior tibise tridentate, more strongly in the female than in the 

 male 2 



Anterior tibiae without trace of any other than the apical oblique spur- 

 like tooth; female not at hand but with bidentate anterior tibiae 

 according to Fall 13 



2 First tooth of the anterior tibiae very large, obliquely and arcuately 

 triangular and strongly compressed from the tibial base; Rocky 

 Mountains. Body rather more parallel and narrowly cylindric than 

 usual, pale red-brown in color above and beneath, the reflexed 

 thoracic margin and the head in part black; head densely punctate 

 and with dense stiff yellowish hairs, the clypeus deeply concave, 

 truncate at apex; last maxillary palpal joint half as long as the 

 antennal club, deeply and narrowly excavated from base to apex; 

 prothorax fully two-thirds wider than long, very convex, the sides 

 deeply crenulate, obtusely angulate behind the middle; apex sinuate, 

 nearly two-thirds as wide as the base, which is broadly lobed medi- 

 ally, the hind angles rounded; surface strongly, very densely punc- 

 tate, broadly and feebly impressed along the median line, each 

 puncture bearing a short decumbent yellowish squamiform hair; 

 side margin notably reflexed near the anterior angles; mesonotum 

 with long yellowish hair, the scutellum densely punctate, with a 

 smooth median line, each puncture with a moderately stout hair; 

 elytra nearly one-half longer than wide, only slightly wider than the 

 prothorax, obliquely impressed at the sides behind the humeri, 

 slightly rugulose and rather feebly, sparsely punctate throughout, 

 each puncture with a minute stout suberect hair; pygidium rather 

 narrowly rounded at apex, densely, feebly punctulate and with 

 close-set decumbent slender squamules; under surface anteriorly 

 with dense long yellowish-brown hair, the abdomen with small 

 sparse decumbent squamules and long sparse erect hairs; middle 

 tarsi much longer than the tibiae; dentition of the tarsal claws rather 

 less unequal than usual. Length (cf) 20.0-21.0 mm.; width 9.4- 

 10.5 mm. Texas (El Paso), Dunn. New Mexico (Albuquerque), 

 LeConte squamicollis Lee. 



First tooth more abruptly erect and acute, less compressed. Pacific 

 coast regions 3 



3 Middle tarsi shorter than the tibiae; last palpal joint less than half 

 as long as the antennal club 4 



Middle tarsi longer than the tibiae; last palpal joint much longer 5 



4 Body stout, very convex, subcylindric, rather dull in lustre, pale 

 red-brown in color throughout, with the usual long dense pubescence 

 beneath, except on the abdomen; vestiture yellowish throughout; 

 head blackish, strongly, densely punctate, with rather long thick 

 dense decumbent and other sparser, very long, fine and erect, hairs; 

 clypeus moderately concave, very finely and densely punctate and 

 with very broadly rounded angles, the hairs whiter than those of the 

 head, rather long but subsquamiform; last palpal joint less than half 

 as long as the antennal club, plumper than in the preceding, with a 

 very broadly oval deep excavation, extending from very near the 

 base to apical fourth, the apex pointed; prothorax much wider than 



