NATURAL SCIENCES OF PHILADELPHIA. 313 



b}^ the depressed base of prothorax, broader lateral margin, sides 

 feebly explanate near the base, and the tarsal grooves feeble and 

 visible on the first joint. 



14. P. CALiFORNicus Dej. An abundant species in California; P. 

 muticus and simplex Lee. are not different ; Brachystylus ampli- 

 collis Motsch. is a form with the prothorax a little wider and more 

 rounded on the sides. 



17. P. SPRAGUEi, veiy elongate, opaque black {%); frontal im- 

 pressions distinct ; prothorax longer than wide, rather strongly- 

 narrowed behind, rounded and finely margined on the sides, which 

 are feeblj^ (but not shortlj'^) sinuate behind; very broadly emargi- 

 nate in front, with the angles rounded ; base straight, not margined, 

 angles rectangular, basal impressions long, very feeble, posterior 

 transverse impression angulated, dorsal line fine, much abbreviated 

 at each end ; elytra elongate oval, a little wider than the prothorax, 

 rounded at base, humeri slightly' dentiform, stria fine, impunctured, 

 rather deeper tow^ards the tip, which is feebly sinuate, scutellar 

 long, joined to the 1st stria; posterior tarsi with the 1st and 2d 

 joints grooved, and the 3d more feebly so. Long. IT mm. 



Nevada, a % kindly given me by Mr. P. S. Sprague, to whom I 

 take great j^leasure in dedicating it, as a mark of appreciation of 

 his labors in the study of our Carabidse. Dr. Horn has also 

 received a specimen from the same region. It is as slender in 

 form as P. longicollis and Hornii^ and is easily known by the dull 

 black color. 



19. P. HORNii, very elongate, piceous black, shining (9), frontal 

 fovese very indistinct, prothorax longer than wide, broadly rounded 

 and finely margined on the sides, rather strongly narrowed behind, 

 scarcely emarginate in front, with the angles not prominent, base 

 straight, not margined towards the angles, which are obtuse and 

 not rounded, basal impressions long but feeble ; elytra elongate 

 oval, scarcely wider than the prothorax, rounded at base, humeri 

 slightly dentiform, strife fine impunctured, rather deeper towards, 

 the tip, which is not very strongly sinuate ; scutellar between first 

 and second stria rather indistinct, moderately short; posterior 

 tarsi with the first joint with a single feebly marked groove on the 

 outer side. Long. 14 mm. 



One female, S. E. Sierras of California, Dr. Horn. Quite dis- 

 tinct from all the allied species by the obtuse hind angles of the 

 21 



