inhabiting the United States. 147 



* Sp. 5. elongatus. 



Angustior ; niger, nitidus ; thorace, elytrisque cyanco-margina- 

 tus ; mandibulis, labio, impressionibusquc capitis ct thoracis rugo- 

 sis 5 caiina humcrali longiore. 



Habitat in Tcrritorio Missouriensi ubique. Tab. I., Jig- 5. 



Pasimachus deprcssus, var. a. Say. Trans. Am. Philos. Soc, 

 New Series, Vol. II., p. 19. 



Niger nitidus ; corpus angustius, convexiusculum ; mandibulas 

 transverse rugOBSB, labrum fortitcr striatum, versus medium utrin- 

 queimpressum ; impressionibus frontalibus profundis, rugulis paucis 

 indistinctis ; linea obliqua fortiter impressa, rugis notata. Thorax 

 lateribus minus rotundatus cccruleo-marginatus ; impressione trans- 

 versa anteriore ad latera profunda, medio obsoleta ; linea longitu- 

 dinal! satis distincta; basalibus triangularibus profundis, rugulis 

 paucis notatis. Elytra longiora, angustiora, apice minus subacu- 

 minata, ccBruleo-marginata, lineis punctorum levibus notata, quae 

 sicut in punctulato, intcrdum obsoletae sunt. 



$ 2. ELYTRA STRIATA. 

 * Sp. 6. substriatus. 



Niger, nitidus, subcyanco-marginatus; mandibulis oblique striatis 

 impressionibus frontalibus postice obsoletis, antice rugosis ; thora- 

 cis impressionibus parvis, triangularibus, profundis, rugosis ; elytris 

 levissime striatis, transverseque rugosis. 



Habitat Long Island, provincial Novi Eboraci. Tab. I., fig. 6. 



Pasimachus substriatus, LeContc, per Halderman, Proceed. 

 Ac. Nat. Sc. Phil. Vol. I. p. 313. 



Niger, nitidus, subcyaneo-marginatus ; caput rugulis paucis 

 pone oculos ; impressionibus frontalibus postice vix conspicuis, an- 

 tice rugis paucis, linea obliqua profunda, valida, rugulis notata; 

 labrum rugosum, antice medio tridontatum, deilte inleinicdio ma- 

 jore, rotund ato ; mandibuhr, oblique striata'. Thorax rugulis paucis 

 ad latera, margins subcyanca, angulis posticis obtusis ; impressione 



