LECONTE— SYNOPSIS OF PTEROSTICHUS. 237 



One specimen, New York. Also similar to P. adoxus, bat the posterior angles 

 of the thorax are neither prominent, nor sharp, but are slightly rounded at the tip- 

 Newman's P. interfector may be either of the three species, but there is nothing in 

 his description which refers to one more than to the other; I have therefore placed it 

 under that which is best known. 



6. P. Isabellas, thorace latitudine subbreviore, distinctius marginato, lateribus late rotundato, postice 



angustato vix brevissime sinuato, basi recto, utrinque minus profunde striato, elytris vix latioribus, striis 

 obsolete punctulatis, postice profundioribus. Long. -66. 

 Lee. An. Lye. 5, 58. 



Found at 'Bill Williams' Ranch' in the mountains east of San Diego, California. 

 Resembles P. illustris, but the thorax is less sinuate behind, and the mesopleurse are 

 sparsely punctured. The male has two anal punctures each side. 



7. P. contractus, angustior, thorace latitudine fere longiore, distinctius marginato, lateribus late 



rotundato, postice angustato et brevissime subsinuato, basi recto, utrinque striato, elytris vix latioribus, 

 dorso subdepressis, striis postice paulo profundioribus. Long. -50. 

 Lee. An. Lye. 5, 58. 



San Francisco and San Jose, California : narrower than either P. Isabella?, or P. 

 illustris, with less convex elytra; the mesoplenrae are punctured as in the preceding. 

 The strise of the elytra are altogether smooth, and the interstices moderately convex. 



8. P. illustris, thorace latitudine sublongiore, distinctius marginato, lateribus rotundato, postice angus- 



tato et longius sinuato, basi recto, utrinque minus profunde striato, elytris vix latioribus, striis postice 



profundioribus. Long. 47 — 7. 

 Lee. An. Lye. 5, 58. 

 San Diego, California. 



9. P. fastiditus, thorace latitudine vix breviore, tenuiter marginato, lateribus rotundato postice magis 



angustato et brevissime sinuato, basi recto, utrinque profunde striato et parce punctato, elytris ovalibus, 



thorace plus sesqui latioribus, profunde striatis. Long. -32. 

 Lee. Agassiz' Lake Superior, 207. 

 Feronia (Platysma?) fastidita Dej. Sp. Gen. 3, 323. 

 Stomis americana Lap. Etudes Entom. 1, 72, (teste Chaudoir, Obs. Kiew. 1847.) 



Throughout the Atlantic zoological district, rare ; the whole postpectus and the 

 sides of the abdomen are punctured. The male has a very faint elevation towards 

 the apex of the abdomen. 



a — p. 



These species are very similar to the preceding, but are a little less graceful in 

 their form, the thorax being not so much narrowed behind ; the posterior angles are 

 rectangular, never rounded ; the base is slightly margined near the posterior angle, 

 but the margin does not extend inwards beyond the basal impression, although not 

 connected with it. The basal impression is linear, deep, and single. The males 



60 



