10 DESCRIPTIONS OF NEW SPECIES. 



and the elytra are less rounded on the sides in front and more ob- 

 tuse behind. 



PTEROSTICHUS Box. 



30. P. spliodriniis. Elongatus, nigernitidus, thorace latitudine paulo 

 longiore, obovato, lateribus et angulis posticis tenuiter inarginatis, his 

 obtusis et rotundatis, linea dorsali vix distincta, ad basin utrinque bieviter 

 impresso, haud marginato elytris elongato-ovalibus thorace haud latiori- 

 bus, striis irnpunctatis, interstitiis paulo convexis, hunieris baud den- 

 ticulatis. Long. *47. 



Nebraska ; Mr. Ulke. This species is related to P. adoxus, 

 but differs from that as from all our other species having no dorsal 

 punctures, by the obtuse and rounded hind angles of the thorax ; 

 in form it is narrower than P. adoxus, and resembles on a large 

 scale P. longicollis. The tip of the prosternum is not surrounded 

 by a marginal line. 



31. P. laetulus. I propose this name for the species form- 

 erly described by me (Journ. Acad. Nat. Sc. 2d Ser. ii. 253), as 

 Poecilus calif ornicus, from which it differs by the bright green 

 color, and by the sides of the thorax being distinctly sinuated 

 behind, and also by the elytra being flatter and more finely striate. 

 Baron Chaudoir considers this species as that described by Dejean, 

 but I have received from Count Mnizech, a species which corres- 

 ponds in color and in other characters with Dejean's description, 

 and which is quite different as will be seen by the comparison 

 above given. 



32. P. texanus. Obscure cupreo-aeneus, nitidus, thorace subquadrato 

 antrorsum angustiore, tenue marginato, lateribus rotundatis postice 

 haud sinuatis, angulis posticis subobtusis, basi utrinque biimpresso, im- 

 pressione externa parva, elytris striis profundus obsolete punctatis, in- 

 terstitio 3io postice bipunctato, anteunis obscuris, articulis duobus 

 primis ferrugineis. Long. -55. 



Texas. Of the same form as P. chalcites, but with the thorax 

 somewhat broader and not at all punctured in the basal impres- 

 sions, and with the elytral striae only obsoletely punctured. 



33. P. splendidulus. Elongatus, supra aerieus nitidus, thorace 

 capite parum latiore, quadrato latitudine breviore, lateribus rotundatis, 

 postice haud sinuatis, angulis posticis obtusis, margine haud depresso, 

 basi utrinque foveis duabus impressis, externa multo iniuore, elytris 



