DE8< aiFTIONS 01 NEW BPECIEa 161 



the tibiae not being blue at base and tip, and bj the tarsi being 

 yellow, with only the extremity of the last joint and the claws 

 blackish. The under surface in both is clothed with long soft 

 erect whitish hairs. 



The male of P. sayi has the last ventral Begmenl less deeply 

 excavated, and more widely bilobed, and the anterior tibiae nol 

 so much compressed above the middle, and much Less concave on 

 the inner face. 



The species of Pomphopcsa in my collection may be recognized 

 by the following table : — 



Elytra glabrous ; 



Knees, tibiae, and tarsi blue black (surface less opaque), polity. 



Knees, apex and tip of tibiae, and all of tin- tarsi blue black, bati. 



Knees blue black, tip of last joint of tarsi, and claws black. rN'.rnri. akis. 



Legs rufous, trocbanters and tarsi with a bluish lustre texana. 

 Elytra pubescent ; bead and tborax densely pubescent ; 



Elytra with a few sbort scattered bairs. .vm:a. 



Elytra densely pubescent, and punctured, taksai.is. 



More slender ; elytra rugosely punctured and less densely 



pubescent. FCUPORioa 



The species with pubescent elytra are closely allied, and i . . 

 in sexual characters; the penultimate ventral Begmenl of the male 

 is very slightly emarginate, and the last joint is very deeply and 

 acutely emarginate, but not excavated. The anterior tibiae arc 

 straight in both sexes. The knees, both extremities of the tibiae 

 and all the tarsi are blue black in J', tarsalis, but in /'. 

 and fdiformis they are merely blackish, and Bometimea scarcely 

 obscure. 



467. P. texana. Elongata, obscure viridi-aenea Bubnitida, - 



thoraceque versus latera pilosis, illo parce punctato, hoc latitndine 

 longiore, lateribus ant.? medium rotundatis poetics parallelia n 

 disco punctis paucis impressis, ante basin l>-vit.-r transversim impn 

 elytris tborace duplo latioribua, coofertim rugose punotatis; ant 

 nigris, pedibus rufo-testaceis, trochanteribna tareisque oyad 

 Long. *54. 



One female from Texas. Differs at first sight from P. * 

 laris by the narrower and mure convex thorax, with the Bid< 

 sinuate. A few very small hairs arc risible near the Bide* 

 tip of the elytra, but not sufficient to enable them to be described 

 as pubescent. The ereel hairs of the head and Bides of the tl 



April, 1866. 



