273 



some individuals they are not visible. The mandibles arc rather 

 coarsely striate, sometimes nearly smooth. The side margins of 

 prothorax and elytra usually are blue. 



11. P. callfornit'us, Chaud., Bull. Mosc, 1350, II., 437. 



P. punetulatus %, Lee. (nee. Ilald.) Ann. Lye., New York, IV. pi. 



VII., f. 3. 

 P. validus, Lee. Jour. Acad. Nat. Sc., Phil., 2d. IV., 14, pi. IV., f. 10. 

 P. corpulcntus, Lee. ibid. 15. 



Texas, northwards to Colorado and Utah. Easily known by the 

 very short humeral carina; the size is usually greater than in the 

 other species of this group. The labrum is trilobed, the middle 

 lobe, when not worn, prominent, a little wider than the side lobes ; 

 the mandibles are deeply striate; the joints 2-4 of the antennae are 

 more strongly compressed and carinate than iu the other species; 

 the hind tibiae and tarsi are less elongated and less slender than in 

 P. depressus, and the former in $ are very densely pubescent on the 

 inner face, near the tip. When rows of punctures are visible on the 

 elytra they are approximated by pairs ; the side margin is feebly 

 tinged with bluish, and is narrower than in depressits, though wider 

 than in duplicatus and costifer. 



P. co7jndentus is probably a form of this species ; the elytra are 

 proportionally broader and more rounded on the sides, the man- 

 dibles nearly smooth, and the middle lobe of the labrum less 

 prominent. 



BUT.. BUP. 80C. NAT. SCI. (35) PEBBUART, 1874. 



