Horn.] «*50 [June 20, 



and coarsely perforato-puuctate. Prosternal sulci deep, broad, trans- 

 verse sulcus not wider than the lateral, anterior portion of prosternum 

 oval, coarsely punctured, posterior portion oval, truncate in front ; lateral 

 carina of prosternum confluent with the ridge limiting the sulcus before 

 attaining the front of prosternum. Length .06 inch ; 1.5 mm. 



This species is readily known by the very coarsely perforato-puuctate 

 meso-metasternal plate. 



Not common. Occurs in the Middle States. 



P. consors, n. sp. 



Oblong oval, black, shining. Head sparsely punctulate, front slightly 

 concave transversely. Thorax slightly broader than loug, marginal stria 

 moderately deep, lateral sulcus moderately deep, entire, marginal space 

 convex, sparsely punctured ; disc unequally divided by a transverse sul- 

 cus, anterior portion slightly more than half the posterior and more finely 

 but not more densely punctured. Elytra coarsely but not densely punc- 

 tured, suture slightly elevated, at base a short oblique humeral and rudi- 

 mentary dorsal ; marginal stria feeble extending one-third to apex. Pygid- 

 ium moderately, neither coarsely nor densely punctured. Metasternum 

 sparsely punctured. Prosternum nearly as in Sayi, posterior portion of 

 carina broader than long, trapezoidal, lateral carina of prosternum ex- 

 tending entirely to apex. Length. 05 inch ; 1.25 mm. 



Narrower and less convex than Sayi and with the meso-metasternal 

 plate very sparsely punctured. 



One specimen, Colorado. 



P. fraternus, Horn, Trans. Am. Ent. Soc, 1870, p. 141. 



Oblong oval, brownish, moderately shining. Head sparsely punctured 

 and slightly transversely concave. Thorax slightly broader than long, 

 marginal stria moderately deep, lateral sulcus entire, marginal space 

 convex, sparsely punctured, more densely in front ; disc unequally divided 

 by a transverse sulcus less distinct at middle, surface sparsely punctured, 

 the anterior division more finely. Elytra sparsely punctured, punc- 

 tures coarse, round and deeply impressed, suture slightly elevated, at 

 base with short oblique humeral and rarely a rudimentary dorsal, mar- 

 ginal short moderately deeply impressed. Pygidium moderately coarsely 

 and densely punctured. Metasternal plate sparsely punctured. Pro- 

 ternum nearly as in Sayi, the portion behind the transverse sulcus oval, 

 subacute in frout, lateral ridge entire, the space between it and the mar- 

 ginal ridge of the sulcus not channeled. Length .05 inch ; 1.25 mm. 



Smaller than the preceding species and relatively broader. Differs 

 especially in the form of posterior division of the prosternum which 

 results from a narrower transverse sulcus. 



Occurs in California and Nevada. 



P. nitidus, Horn, Trans. Am. Ent. Soc, 1870, p. 141. 

 Oblong oval, black, shining. Head sparsely punctulate, front transversely 

 slightly concave. Thorax slightly broader than long, marginal stria 



