312 PROCEEDINGS OF THE ACADEMY OP 



inside of the first stria; posterior tarsi slender, with the first joint 

 strongly grooved. Long. 11 mm. 



Washington Territory and Vancouver ; Messrs. Davidson and 

 Matthews. A very distinct species by the finely crenate lateral 

 edge of the prothorax. The % has the usual anal point each side, 

 but the 9 has ;/?ree, and in one specimen three on one side and 

 four on the other. 



9. P. LONGULUS, elongate, shining black, prothorax as wide as 

 long, rounded on the sides, narrowed behind, sides not sinuate, 

 hind angles obtuse not prominent, posterior transverse impression 

 distinct, basal impressions long, linear, outer one -wanting, base not 

 depressed near the angles but finely margined ; elytra scarcely 

 wider than the prothorax, sides nearly straight, rounded towards 

 the humeri, which are dentiform, strins well impressed, obsoletely 

 punctured, scutellar stria wanting ; posterior tarsi with three 

 joints grooved on the outer side. Long. 11 mm. 



Colorado, one pair given me by Dr. S. Lewis. Very nearly 

 allied to P. vicinus^ but smaller and narrower, with the hind angles 

 of the prothorax not rectangular and prominent, and the scutellar 

 stria absent. 



12. P. CASTANEus (Dej.) I can find no substantial difference be- 

 tween the types of this species and P. brunneus Dej., which were 

 sent me by Baron Chaudoir ; in the latter the sides of the pro- 

 thorax are a little less distinctly flattened tow\ards the base ; I also 

 received a specimen of the latter form from Col. Motschulsky, 

 labelled P. viciyius Mann., from which it difters obviously by the 

 characters given in the preceding table. 



13. P. scuTELLARis, elongate, pitchy black shining, prothorax as 

 wide as long, broadly rounded on the sides, moderately narrowed 

 behind, sides feebly sinuate near the hind angles which are rect- 

 angular, base depressed each side and finely margined, transverse 

 impressions distinct, basal impressions rather short, outer one 

 wanting, margin slightly explanate near the base ; elytra rather 

 flat, parallel, feebly rounded near the humeri which are prominent 

 and dentiform, striie well impressed, feebly punctured, scutellar 

 long, between the first and second; posterior tarsi with the first 

 joint feebly grooved on the outer side. Long. 9-11 mm. 



Two specimens, California, Mr. G. Davidson. Closely related 

 to P. caslanem, but easily distinguished by the well-marked scu- 

 tellar stria. It resembles in form F. vicinus,hut is known at once 



