1851.] 341 



New York; Mr. Guex. One specimen ; resembles in appearance T. rectus, 

 lineola ami several others of the third division. 



12. 1'. tuberculatus, niger, tborace transverso, valde marginato. 

 siibcanaliculato, lateribus flavo-rulis snbrotiindatis, antice transversim irnpressis, 

 tuberculo parvo versus angulos anticos notatis, elytris valde punctato-scabris. 

 Long. -2.3. 



Georgia ; one specimen. Very similar to the last; the sides of the thorax are 

 more rounded ; the litlle tubercle is rather on the disc than the marginal part 

 of the thorax. 



b. Ungues omnes simplices. 



13. T. b r e V i c o 1 1 i s , niger, mandibulis, thoracisque lateribus flavis ; 

 thorace valde transverso, marginato, antice vix impresso, lateribus subrotun- 

 datis. elytris minus subtiliter punctato-scabris. Long. '22. 



One specimen ; Georgia. 



14. T. u n d u 1 a t u s, niger, thorace roseo-pallido, valde transverso, late 

 marginato, antice subangustato, lateribus repandis, canaliculato, medio nigro, 

 elytris valde scabris, margine, sutura, bumeris abdominisque margine testaceo. 

 Long. -3. 



Georgia ; M. Guex. The thorax is as wide as the elytra ; the disc has a short 

 transverse impression on each side of the middle This may possibly be Can- 

 tharis invalida 5*ay. Bost. Journ. Nat. Hist. 1, 159, but the form of the thorax 

 is not mentioned, and Say's insect appears to have been much smaller. 



c. Ungues omnes dentati, saepius fero fissi. Rhagonyclia Esch. 



15. T. d e n t i g e r, niger, mandibulis thoraceque testaceis, hoc transverso 

 late marginato, pimctato, canaliculato, lateribus rotundatis, disco utrinque pone 

 medium late infuscato, elytris scabris, epipleuris abdominisque margine testaceis. 

 Long, -SS. 



One specimen ; Maryland. Same size and form as the following, but at once 

 distinguished by its punctured thorax and the shortness of the ungual tooth. 



16. T. c n r o 1 i n u s. Canlhuris carulinu Fabr. Syst. El. 1, 296. Middle 

 and Southern States, 



17. T. curtus. Podabrus curtus Lpc. Agassiz Lake Superior, 229. 

 ? Canthuris percomis Say. Bost. Journ. Nat. Hist. 1, 159. 



18. T. c i n c t e 1 1 u s, subtus testaceus, capile postice nigro, thorace 

 flavo, transverso, ansuste marginato, lateribus rectis, elytris confertim RcabrO' 

 punctatis piceis, sutura margine scutelloque pallidis, antennis obscuris basi 

 pedibusque flavis. Long. 2. 



Georgia and Missouri Territory. 'J'his and all the following species have 

 the tooth of the claw almost equal to the claw itself. 



19. 'I', d i c h r o u s, niger, fronte thoraceque flavis hoc latitudine vix 

 breviore, lateribus vix rotundatis, margine reflexo ad medium angustiore, disc 

 ad latera antice pauIo excavato, versus basin in medio paulo deplanato, elytris 

 scabro punctatis, pedibiis antennarumque basi rufis. Long. '2. Missouri Ter- 

 ritory. 



20. T. f 1 a V i p e s, niger, fronte thoraceque flavis, hoc quadrato, lateribus 

 rectis margine refiexo ad medium angustissimo, disco nigro-vittato, postice ob- 

 solete canaliculato ad latera antice vix excavato, elytiis subtilius scab<io jpuucta- 

 tis, antennarum basi pedibusque rufis. Long* '22. 



