STAPHYLINID.E. 31 



scarcely tapering, the last segment broadly rounded, the surface smooth or 

 with the faintest possible shallow punctuation and unpro^dded with hairs. 



Length, 9.5 mm.; breadth, 2.1 mm. 



Florissant, Colorado; one specimen, No. 13678. 



LEISTOTROPHUS Perty. 



North America possesses two liv-ing species of this genus, most of 

 whose other species, not numerous, occur in Europe. A single fossil species 

 has been found in Utah. 



Leistotrophus patkiarchicus. 



Leistotro]i)liuii j>atriarcliicus Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., II, 78-79 

 (1876); Tert. Ins. N. A., 507, pi. 5, %. 112 (1890). 



White River, Utah. 



STAPHYLINUS llxmL 



This genus has numerous species all over the world, of which about 

 twenty occur in the United States. Fossil species are by no means unknown, 

 nine having been described from Aix, Oeningen, and Florissant, while the 

 genus has been recognized in such diflferent deposits as Senigaglia in Italy, 

 Sicilian amber, Baltic amber, Rott on the Rhine, and the Isle of Wight, 

 leading us to presume several additional species, all in the early Tertiaries. 



Staphylinxjs lesleyi sp. nov. 

 PI. VI, figs. 6, 7. 

 This most abundant species of the genus and one of the commonest of 

 the family at Florissant resembles most 8. cmnamoiiterus Grav., but is scarcely 

 so large and has shorter and stouter antennae, and slenderer less densely 

 spinous tibise. The head is subti'iangular, the basal third with parallel sides, 

 in front of which it tapers considerably; the posterior margin is ti'uncate, 

 but with rounded angles, and the head is a little longer than broad, includ- 

 ing the sharply pointed longitudinal!}' channeled mandibles; the surface is 

 very delicately graniilate. The antennas are about as long as the elytra 

 and are well represented in fig. 7, though the extreme base of the first joint 

 does not appear. The pronotum is slightly broader than the head and of 

 the same length as it, fig. 6 showing it a little too short; it is nearly quad- 

 rate, of about equal length and breadth, with slightly convex sides and 



