NATURAL SCIENCES OF PHILADELPHIA. 839 



versa media sinuata, obtuse deflexa, saepe deficiente alba ; subtus nigra parce 

 albo-pilosa. Long. *6. 



Mas labro mandibularumque basi albis ; femina labro mandibulisquenigris. 



Valleys of the Rocky Mountains. Belongs to the same group (III. of my 

 Monograph, Trans. Am. Phil. Soc. xi. 33) asC. longilabris, from which 

 it differs at first sight by the shining and more deeply punctured elytra, as 

 well as by the black labrum of the female. 



3. Trachypachys & i b b s i i, ovalis, nigro-asneus, nitidus, thorace latitudine 

 fere duplo breviore, antrorsum sensim angustato, lateribus rotundatis, postice 

 profunde transversim impresso, utrinque subbifoveato, et parce punctato, 

 elytris versus suturam seriatim punctatis. Long. -25. 



East of Fort Colville. Larger and broader than T. in e rmi s Motsch., and 

 very different by the form of the thorax and its posterior impression. The 

 thorax is not at all narrowed behind, but gradually narrowed almost from the 

 base to the apex ; the impression is somewhat punctured, with two moder- 

 ately distinct foveae each side. 



4. Pterostichus or ego nus, longiusculus, niger, nitidus, (elytris feminae 

 opaciusculis) thorace latitudine haud breviore, postice angustato, lateribus 

 late rotundatis postice subsinuatis, tenuiter marginatis, angulis posticis sub- 

 rectis, basi utrinque parce punctato, et stria basalilongiuscula impresso, linea 

 dorsali profunda, elytris striis tenuibus haud punctatis, interstitiis planis, 3io 

 foveis 5 impresso. Long. - 55 - 58. 



East of Fort Colville. This species belongs to the same division as P. o r i- 

 nomum, adstrictus, &c, ( Bothriopterus Chaudoir), but differs much in 

 shape from those species, resembling, in fact, very closely in outline our com- 

 mon P. a d o x u s, and having the margin of the thorax not wider than in 

 that species. 



5. Anisodactylus vi ri des ce ns, elongato-oblongus, aeneo-viridis, nitidus, 

 capite utrinque fortius haud dense punctato, thorace latitudine paulo breviore 

 postice parum angustato, lateribus late rotundatis postice subobliquis haud 

 sinuatis anguste marginatis, angulis posticis obtusis subrotundatis, basi 

 utrinque impresso, apice basi lateribusque punctato, elytris striatis subpubes- 

 centibus, interstitiis alternis punctatis alternis, sublaevibus, 3io postice 1-punc- 

 tato ; subtus niger. Long. -34 -38. 



California ; Mr. A. Murray. Cape Mendocino ; Mr. A. Agassiz. This spe- 

 cies is related to A. al tern an s Zee, but the sides of the thorax are not 

 sinuate, and the hind angles are not prominent. The 3d and 5th intervals 

 are smooth, but in most specimens, on close inspection, a series of small 

 points is visible at their inner margin. The first and seventh intervals are 

 free from punctures ; the others are distinctly, but not densely punctured. 

 The punctures emit very short pale hairs. 



6. Anisodactylus pitychrous, elongato-oblongus, nigro-piceus, nitidus, 

 thorace latitudine vix breviore, postice paulo angustato, lateribus tenuiter 

 marginatis antice rotundatis, postice obliquis, angulis posticis subrectis, basi 

 utrinque anguste impressa et punctulata, elytris striatis, interstitiis subplanis. 

 Long. "40. 



One male; California; Mr. A. Murray. This species has the form of A. 

 baltimorensis, but the basal impressions of the thorax, instead of being 

 large rounded foveae, are narrow, and the punctures are confined to the 

 depth of the impressions. The color of the head and thorax is almost black ; 

 the rest of the body has a decided piceous tinge. 



7. Harpalus fraternus Lee. This species has an extensive range, being 

 found in Oregon, Kansas, Nebraska and New Mexico ; a somewhat immature 

 specimen from the last named locality was described by me as H. oblitus. 



1831.] 



