DESCRIPTIONS OF NEW SPECIES. 155 



Differs from B. limbatus by the smaller size, different color, and 

 more finely punctured thorax ; the posterior lobe is less rounded 

 at tip than in that species. 



MELOE LINN. 



452. Hf. montanilS. Nigro-violaceus, capite thoraceque fortiter 

 punctatis, hoc capite angustiore, latitudine longiore, postice angustato, 

 basi emarginato ; elytris fortiter intricato-rugosis ; abdomine supra con- 

 fertim subtilius rugoso ; antennis articulis interinediis (feminse) paulo 

 latioribus. Long. -55 '86. 



One female from Oregon, and another from Montana. This 

 species is closely allied to M. rugipennis, and, as in that species, 

 the thorax is destitute of impressions ; but the punctures of the head 

 and thorax are more numerous, and less unequally distributed, 

 and the dorsal segments of the abdomen are more finely rugose. 



The male, when discovered, will be found to have the 5th, 6th, 

 and 7th joints of the antenna? dilated, as in M. rugipennis ; the 

 8th and 9th joints of the female are about as long as their width, 

 the 10th is one-third longer. 



453. M. tilictlis. Nigro-violaceus, capite thoraceque fortiter punc- 

 tatis, hoc capite angustiore, latitudine longiore, postice paulo angustato, 

 canaliculate, margine postico depresso, basi emarginato ; elytris fortiter 

 intricato-rugosis ; abdomine supra subtilissime rugoso ; antennis articulis 

 intermediis (feminse) paulo latioribus. Long. -44 -50. 



Three females from Nebraska, near the Rocky Mountains. 

 Differs from the preceding by the head and thorax being still 

 more coarsely punctured, the latter channelled, with the basal 

 margin strongly depressed, and the dorsal segments of the abdo- 

 men much more finely rugose. The 8th, 9th, and 10th joints of 

 the antennas are nearly equal in size. 



M. afer differs from this species by the color being black, with- 

 out any bluish tint, and by the dorsal segments being strongly 

 rugose, as in M. montanus. 



454. M. carbonaceus. Ater, subnitidus, capite thoraceque rude 

 punctatis, hoc capite angustiore, latitudine parum longiore, ovato, 

 postice angustato, pone medium canaliculate, ad basin emarginato ; 

 elytris fortiter intricato-rugosis, abdomine supra rugose punctate ; an- 

 tennis articulis intermediis (feminse) paulo latioribus. Long. -64 -74. 



Two females from Nebraska, near the Rocky Mountains. 

 Differs from the preceding by the head and thorax being more 



