NATURAL SCIENCES OF PHILADELPHIA. 367 



Mas abdomine elytris paulo longiore, articulis duobus ultimis connatis, fere 

 glabris ; 6to triangulari, impresso, imo apice rotundato, longe ciliato. 



Femina abdomine simplici, elytris hand longiore. 



Pennsylvania, New York and Lake Superior. There are five specimens be- 

 fore me. This species differs from the European species, except L. atom u s, 

 by the distinct sutural stria, which extends from the tip to within one-third of 

 the base. I have observed no sexual difference in the legs. The last two ven- 

 tral segments of the male are connate, forming a plate, which is triangularly im- 

 pressed at the base, but rounded and ciliate with long hairs at the tip. 



NECROPHORUS Fabr. 



N. Hecate Bland, Proc. Ent, Soc. Phila., iv., 382. 



Kansas and Colorado. This species resembles in the form of the thorax N. 

 Melsheimeri Kirby, but differs by the smaller size, the less finely punctured 

 head and thorax, and by the deeper dorsal channel of the latter ; the red mark- 

 ings vary in size, being sometimes as in N. m arginatus and Melshei- 

 meri, except that the black extends slightly upon the epipleurje behind the 

 humeri ; and sometimes so broad that the two bands become united, leaving 

 only the base, apical margin, small common sutural spot, sutural margin 

 behind the middle, and another small lobed spot near the side, black. The 

 club oYthe antennas is entirely ferruginous. Length 11-5 20 mm. 



I have received, through the friendly attention of Mr. A. Murray, sketches of 

 the thorax, elytra and antennas of N. ob scums and hebes Kirby; the 

 former does not appear to be different from that which I have recognized as N. 

 M e 1 s h e i m e r x^Kirby ; the hind trochanters are emarginate in the female, 

 but the inner angle is recurved in the male. N. h e b e s is a species unknown 

 to me, differing from N. marginatus and Melsheimeri by the club of 

 the antennas being entirely black, and the posterior red band being represented 

 by a large irregular spot, touching neither the side nor the suture ; the epi- 

 pleurae, as in the species named, are entirely red. 



N. confossor Lee., Proc. Acad. Nat. Sc. Phila., vii. 19. 



From Oregon. Appears to be a -variety of N. m a r i t i m u s Mann., with 

 very broad markings ; the red bands are as broad as in N. marginatus or 

 N. Melsheimeri, from which it differs by the thorax being scared}' nar- 

 rowed behind, and with a wider depressed margin ; the first joint of the antennal 

 club is black, as in N. Melsheimeri, and the hind trochanters of the 

 female are emarginate, while, as in that species, the inner angle of the male is 

 strongly recurved. 



N. p y g m ae u s Kirby. In the List of Coleoptera of North America I have 

 incorrectly placed this as a synonym of N. mortuoru m, from which it dif- 

 fers by the absence of the red spot at the base of the epipleurae. 



N. defodiens Mann, seems to be a larger form of N. pygmoeus, 

 with narrower markings. I have specimens from Oregon, intermediate in size 

 between the very small Canadian form and the large specimens found in Rus- 

 sian America. 



SILPHA Linn. 



S. opaca Lmn. The occurrence of this species in Arctic America, on the 

 borders of Mackenzie and Slave Rivers, is mentioned by Mr. A. White, in Rich- 

 ardson's Arctic Searching Expedition, p. 474. I am indebted to Mr. Ulke for a 

 specimen collected by Mr. Robert Kennicott, in the Hudson Bay Territory. 



LEPTINUS Muller. 



L. americanus, ovalis depressus, testaceus, confertim subtilius rugose 

 punctatus, pube pallida sat dense vestitus, thorace latitudine breviore antror- 

 sum angustato, lateribus rotundatis, basi late rotundatim emarginata, anguli? 



1866.] 



