252 J. L. LECONTE, M. D. 



inflexed part of the elytra there is a curved costa parallel with and 

 approximate to the margin, but in the interspace between it and the 

 fourth costa there is an acute costa abbreviated, both before and behind. 

 The sides of the prothorax are oblique in front, obtusely angulated at 

 the middle, then parallel and undulated nearly to the basal angle which 

 is slightly obtuse and rounded. 



5. M. obliqnns, n. sp. — Blackish-brown, head and prothorax subopake, 

 elytra and abdomen shining; of the same form and size as M. sculptus. Head 

 with two oblique ridges and the side margin elevated. Prothorax nearly three 

 times wider than long, widest at base, narrowed and slightly rounded on the 

 sides to the tip, slightly repand, but not angulated; disc divided into cells as 

 usual, but the flattened sides are less uneven than in M. sculptus. Elytra 

 costate precisely as in that species, each with four dorsal eostse, and a curved 

 one on the inflexed side margin; in the interspace between this lateral one and 

 the fourth dorsal is an acute costa abbreviated before and behind, interspaces 

 wide, smooth. Penultimate dorsal segment of the abdomen impressed as usual. 

 Length 1.4 mm; .05 inch. 



British Columbia, one specimen. The differences between this and 

 the preceding may be merely sexual, but in the absence of other 

 specimens, I am hardly warranted in considering specimens from such 

 distant localities as pertaining to the same species. 



6. 91. COStatllS, Lee. Agassiz, Lake Superior, 221 ; M. costipennis Maklin, 

 Bull. Mosc. 1853, ii, 200. 



Lake Superior; California, (at Gilroy) ; Alaska; a typical specimen 

 was kindly sent by Prof. Maklin. The interspaces of the elytra are 

 smooth, or nearly so, and very wide; the usual third costa is wanting, 

 and the fourth is entire ; on the inflexed side of the elytra there is 

 also an entire costa, which is curved and parallel with the margin. 

 The sides of the thorax are oblique in front, feebly angulated at the 

 middle, then parallel nearly to the base, where they are slightly in- 

 flexed, causing the basal angles to become somewhat obtuse, and 

 slightly rounded. This species differs from all the others in having 

 the penultimate dorsal segment not carinate or impressed, thus ex- 

 hibiting a passage to the next genus. 



7. M. brunneus, Maklin, Bull. Mosc. 1852, ii, 326. 

 Alaska. Unknown to me. 



KALISSUS Lee. 



1. K. nitidns, Lee. Trans. Am. Ent. Soc. V, 50. 



Vancouver's Island, one specimen collected by Mr. G. R. Crotch. 



