LECONTE— SYNOPSIS OF PTEROSTICHUS. SI51 



1. L. saphyrinus, thorace latitudine sesqui breviore, lateribus rot'indatis posticesubexplanatis, angulis 



posticis rotundatis, basi utrinque striate, elytris striis profundis antice punctulatis, pedibus piceis, 

 antennarum articulo primo rufo. Long. '6. 

 Megalostylus saphyrinus Chaudoir, Bull. Mosc. 1843, 96. 



New Orleans; for a unique specimen I am indebted to Dr. Schaum ; the iridescent 

 reflections are more brilliant than in the other large species. 



2. L. rectus, thorace latitudine breviore, lateribus rotundatis, angulis posticis subobtusis vix rotundatis, 



basi utrinque striate et parce punctato, elytris striis profundis fortiter punctulatis, antennis palpis 

 pedibusque rufis. Long. "41 — -52. 

 Feronia recta Say, Trans. Am. Phil. Soc. 2, 58. 

 Feronia (^Ar(jutor~) lucidula Dej. Sp. Gen. 3, 829. 

 Poij07ius rectus Ssij, Trans. Am. Pliil. Soc 4, 421. 

 Anjutor lucidulus Lee. An. Lye. 4, 340. 

 Megalostylus laticollis Chaudoir, Bull. Mosc. 1843, 96. 

 Artjutor laticollis Lee. An. Lye. 4, 340. 



Southern States ; very abundant. The last two names belong to a scarcely per- 

 ceptible variety with rather sharper posterior thoracic angles. I falsely considered 

 (An. Lye. 4, 338) Feronia recta Say as being F. velox Dej., but by a strange over- 

 sight neglected the size, which in the species of this genus is of considerable import- 

 ance Say's description requires an insect nearly three-fifths of an inch in length. 



3. L. brevicollis, thorace latitudine sesqui breviore antroi sum subangustato, lateribus late rotundato, 



angulis posticis obtusis minime rotundatis, basi utrinque striato vix parce punctato, elytris striis pro- 

 fundis vix obsolete punctulatis, pedibus piceis, antennis, tarsis palpisque rufo-piceis. Long. -43. 

 Argutor brevicollis Lee. An. Lye. 4, 338. 

 Argutor minor^ Lee. An. Lye. 4, 338. 



Pennsylvania and Georgia ; rare. The last synonym belongs to an infinitesimal 

 variety with rufo-piceous tibiae ; this species is broader than the other species with 

 dark legs. 



4. L. e r r a t i c u s , thorace latitudine vix breviore, lateribus antice late rotundatis, angulis posticis subrectis, 



minime rotundatis, basi utrinque striato, vix parce punctato, elytris striis profundis antice subtilius 



punctulatis, antennis palpis tarsisque rufo-piceis. Long. -44. 

 Feronia (^Argutor') erratica Dej. Sp. Gen. 3, 240. 

 Megalostylus erraticus Chaudoir, Bull. Mosc. 1843, 96. 

 Argutor erraticus Lee. An. Lye. 4, 339. 



Southern States; abundant. 



4. L. minor, thorace latitudine breviore, antrorsum subangustato, lateribus rotundatis, angulis posticis 

 obtusis subrotundatis, basi utrinque striato, elytris striis profundis antice vix punctulatis, antennis, , 

 palpis, tibiis tarsisque rufo-piceis. Long. "4. 

 Megalostylus minor Chaudoir, Bull. Mose. 1843, 96. 

 Argutor nitidulus Lee. An. Lye. 4, 339. 



Georgia and Louisiana. The sides of the thorax are more regularly rounded than 

 in the preceding and do not descend obliquely towards the base. 



