NATURAL SCIENCES OF PHILADELPHIA. 315 



Melampps priscus, Meek. Shell oval, moderately thick ; spire depressed 

 conical ; whorls about five, convex or subangular, last one comparatively large, 

 shouldered above, and tapering below the middle ; suture well defined ; sur- 

 face marked by rather obscure lines of growth, and small regular, vertical or 

 slightly oblique folds, which are distinct on the spire and the upper part of 

 the body, but obsolete below ; aperture narrow, angular above, and narrowly 

 rounded below ; outer lip apparently sharp and without teeth or crenulations 

 within; columella provided with one rather strong oblique fold below, and a 

 much smaller less oblique one about half way up the aperture. Length near 

 0-77 inch ; breadth 0-50 inch ; apical angle nearly regular, divergence about 

 80. 



Locality and position. Estnary beds on Bear River near mouth of Sulphur 

 Creek, lat. 41 12' north, long. 110 52' west. 



Kotes on Coleoptera found at Fort Simpson, Mackenzie River, with remarks on 



Northern Species. 



BY JOHN L. LE CONTE, M. D. 



A small collection made at Fort Simpson, by Mr. Robert Kennicott, although 

 containing but few species, has seemed to me a convenient nucleus, about 

 which I could place certain notes derived from the study of other collec- 

 tions received from Russian America, through Prof. F. W. Maklin, and some 

 interesting specimens from Fort Jasper in the northern part of the Rocky 

 Mountains, kindly sent me by my learned friend, A. Murray, Esq., of Edin- 

 burgh. 



Species from Fort Simpson. 



Carabus Chamissonis Fischer. 



Opisthius Richardsonii Kirby. 



Platynus margin ellus, capite thoraceque nigro-piceis, hoc quadrato, 

 postice paulo angustato, et lateribus paulo sinuato, margine testaceo refiexo, 

 asi utrinque late impresso et subrugoso, angulis posticis obtusis rotundatis, 

 elytris thorace duplo latioribus, piceis, subsenescentibus, basi emarginatis, 

 striis haud punctatis, interstitio 3io pnnctis 5 vel 6 impressis, antennis piceis, 

 pedibus dilutioribus. Long. "25 *28. 



Several specimens sent. The elytra are sometimes pale, sometimes dark 

 piceous ; the intervals between the striae are rarely flat, usually moderately 

 convex ; the impressed punctures are tolerably large ; the under surface is 

 piceous, the base of the antenna? and feet paler. This species resembles 

 P. anchomenoides more nearly than any other species in my col- 

 lection, but the thorax is more narrowed behind, with the margin narrowly 

 reflexed, and the sides somewhat sinuate towards the posterior angles. The 

 posterior transverse impression of the thorax is well marked, and the dorsal 

 line distinct. 



Pterostichus mandibularis; specimens in no wise differing from other 55 

 found by me at Lake Superior, were sent me by Mr. Kennicott. The specie 8 

 is very closely allied to Cryobius fastidiosus Mann, from Russian America, 

 but differs by the thorax being broader, with the sides more suddenly and 

 more distinctly sinuate at the posterior angles. 



Pterostichus Luczotii Lee. (Feronia Lucz. Dej. ; F. obJongonotata Say). 

 One specimen not differing from those found at Lake Superior. 



Pterostichus 6-pun ct at u s Mann, Two specimens quite similar to those 

 from Russian America. 

 I860.] 



