120 GEO. H. HORN. M. D. 



Thorax shining, irregularly and sparsely, coarsely punctate. Spurs of hind 

 tibi£e % free and slender. Form oblong. Clypeus feebly emarginate. 



laevigatus Bl. 

 3. — Thorax with a distinct basal marginal line, interrupted at middle. 



Clypeus rather strongly emarginate, thorax rather finely but regularly 



sparsely punctate cephaliciis n. sp. 



Clypeus scarcely at all emarginate, thorax very coarsely and irregularly 



sparsely punctate pubicollis Bl. 



Thorax without basal marginal line, clypeus feebly emarginate. 



Elevated portion of prosternum behind the front coxse in form of a trans- 

 verse lamina broadly emarginate at summit. 

 Head rugosely punctate, the punctures coarse and more or less confluent. 



pallidum n. sp. 

 Head coarsely punctate, the punctures distinct and not confluent. 



vexatus« n. sp. 

 Elevated portion of prosternum deeply emarginate, the angles prolonged in 

 the form of processes. 



Head pale, not densely nor coai'sely punctate (lebilis n. sp. 



Head piceous, deeply, coarsely and densely punctate. 



ge<»rs;iaiius n. sp. 

 P. ceplialicus n. sp. — Form rather slender, moderately elongate, color vary- 

 ing from piceous to castaneous. Head coarsely and deeply but not closely punc- 

 tate, a distinct longitudinal frontal impression, clypeus rather deeply emarginate, 

 more densely punctured and rugose than the front. Thorax short, more than twice 

 as wide as long, apex feebly emarginate, not narrower than the base, sides moder- 

 ately arcuate, margin not crenulate, basal marginal line distinct and entire, sur- 

 face shining, punctures moderate in size, rather sparsely placed, but evenly dis- 

 posed over the entire surface. Scutellum with very few punctures. Elytra not 

 wider at base than the thorax, shining, surface coarsely not closely punctata, su- 

 tural costa moderately elevated, the oblique costa scarcely evident, a vague lateral 

 costa a little more distinct. Pygidium very coarsely but sparsely punctate, es- 

 pecially near the apex. Prothorax beneath with very few punctures. Metaster- 

 num closely punctate at the sides, very sparsely at middle, finely sparsely villous. 

 Abdomen coarsely, sparsely punctate. Length ./50 inch; 15 mm. 



Male. — Antennal club as long as the funicle. Spurs of hind tibise free, the inner 

 twice as long as the outer. Fifth ventral segment slightly flattened at middle. 

 Female. — Antennal club a little shorter. Spurs of bind tibise nearly equal. 

 Collected in Arizona by Morrison. 



P. robnstllS n. sp. — Facies robust, nearly that of Lack, crassw.tima, brown, 

 feebly shining. Head coarsely rugosely punctured, clypeus very slightly emar- 

 ginate. Thorax narrower in front, sides moderately arcuate, as wide at base as at 

 middle, lateral margin not crenulate, basal marginal line distinct at the sides, 

 hind angle.s rectangular; surface feebly shining, moderately nunctate, the punc- 

 tures closely placed and equally disposed over the entire surface, very sparsely 

 pubescent. Scutellum coarsely punctate. Elytra verj little wider at base than 

 the thorax, coarsely and moderately closely punctate, the sutural and oblique 

 costae feeble. Pygidium obsoletely punctate, the punctures very shallow but va- 

 riolate. Body beneath sparsely punctured, the metasternum villous. Length .80 

 inch; 20 mm. 



