NORTH AMERICAN OOLEOPTERA. 121 



Male. — Anteniial club nearly as long as the entire stem. Outer spur of hind 

 tibiae short, stout and fixed. Abdomen vaguely concave at middle. 



In this species the claws are unequally cleft, the upper portion being 

 much more slender and shorter than the lower portion. As in all the 

 species in our fauna the antennae are lO-jointed. This species differs 

 from all those described from Mexico by the very equally and rather 

 closely punctured thorax. 



One specimen in my cabinet from the Berlandiere collection made 

 along the Rio Grande, and may possibly have been collected on the 

 Mexican side of the river at Matamoras. 



The antennae in this species are rather short, resulting from the fact 

 that the third joint is the only one elongate, the 4-7 being short and 

 quite transverse. Ihe post-coxal elevation of the prosternum is broad 

 and feebly emarginate. The head is rather large and broad, recalling 

 those of the Lachnosteniae allied to longitarsis, which this species re- 

 sembles in form but not in color. The claws are so cleft that the upper 

 portion is as large as the lower and somewhat longer. 



Occurs in New Mexico and Arizona. 



P. pallidum n. sp. — Form oblong, a little more slender than Lack, glaberrima, 

 color testaceous, the elytra a little paler. Head darker in color, coarsely, densely 

 andrugosely punctured, clypeus feebly emarginate. Thorax a little more than 

 twice as wide as long, a little narrower in front, sides moderately arcuate, margin 

 not crenulate, base with a faint trace of marginal line near the hind angles, sur- 

 face shining, punctures moderately coarse sparsely placed, and regularly disposed. 

 Elytra scarcely wider than the thorax, sparsely, rather coarsely punctate, smoother 

 near the apex, the sutural costa moderateh' distinct, the oblique discal and sub- 

 marginal obliterated. Pygidiura coarsely sparsely punctate, shining. Prothorax 

 beneath very sparsely punctate. Metasternuin moderately closely punctured at 

 the sides, very sparsely at middle, clothed with short sparse hair. Abdomen very 

 finely sparsely punctate at middle, more cr)arsely at the sides. Length .56 inch; 

 14 mm. 



The male of this species is unknown to me. The female has the an- 

 tennal club about as long as the funicle. The spurs of the hind tibiae 

 are both free and nearly equal in length. The post-coxal elevation of 

 the prosternum is broad and vaguely emarginate at tip. The claws are 

 equally cleft, the two portions being similar. 



Occurs in Arizona. 



P. vexatus n. sp.— Oblong, yellowish testaceous. Head darker, coarsely and 

 moderately closely punctate, clypeus feebly emarginate, less closely punctured 

 than the front. Thorax not more than twice as wide as long, narrower in front, 

 sides arcuate, margin entire, basal marginal line absent, surface shining, moder- 

 ately coarsely but sparsely punctate, the punctures somewhat irregularly disposed. 

 Elytra a little wider at base than the thorax, moderately coarsely and sparsely punc- 



TBANS. AMER. KNT. SOC. XII. (20) MARCH, 1886. 



