DESCRIPTIONS OF NEW SPECIES. 161 



the tibiae not being blue at base and tip, and by 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 segment less deeply 

 excavated, and more widely bilobed, and the anterior tibiae not 

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

 the inner face. 



The species of Pomphopoea in my collection may be recognized 

 by the following table : 



Elytra glabrous ; 



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



Knees, apex and tip of tibiae, and all of the tarsi blue black. SAYI. 



Kness blue black, tip of last joint of tarsi, and claws black. CNGUICPLABIS. 



Legs rufous, trochanters and tarsi with a bluish lustre TEXANA. 

 Elytra pubescent ; head and thorax densely pubescent ; 



Elytra with a few short scattered hairs. .SNEA. 



Elytra densely pubescent, and punctured. TARSALIS. 



More slender ; elytra rugosely punctured and less densely 



pubescent. FILIFORMIS. 



The species with pubescent elytra are closely allied, and agree 

 in sexual characters ; the penultimate ventral segment of the male 

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

 acutely emarginate, but not excavated. The anterior tibiae are 

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

 and all the tarsi are blue black in P. tarsalis, but in P. senea 

 and filiformis they are merely blackish, and sometimes scarcely 

 obscure. 



467. P. texana. Elongata, obscure viridi-aenea subnitida, capite 

 thoraceque versus latera pilosis, illo parce punctate, hoc latitudine 

 longiore, lateribus ante medium rotundatis postice parallelis rectis, 

 disco punctis paucis impressis, ante basin leviter transversim impresso; 

 elytris thorace duplo latioribus, confertim rugose punctatis ; antennis 

 nigris, pedibus rufo-testaceis, trochanteribus tarsisque cyaneo-tinctis. 

 Long. '54. 



One female from Texas. Differs at first sight from P. unguicu- 

 laris by the narrower and more convex thorax, with the sides not 

 sinuate. A few very small hairs are visible near the sides and 

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

 as pubescent. The erect hairs of the head and sides of the thorax 

 April, 1866. 



