OOLEOPTEEA STAPHTLINID^B. .".i C, 



however, a little smaller, tin- tliir.-i\ tapers less rapidly, and the elytra are 

 not striate. The head is badly preserved, being- crowded under the thorax ; 

 it appears, however, to be very small, about half as broad as the thorax, 

 with ;i broadly rounded front, large eyes, and a dark color. The thorax is 

 about two and a half times broader than long, with slightly convex sides, 

 regularly tapering toward the apex, but not so rapidly as would seem tn \- 

 required tor so proportionally narrow a head; the front border hroadlv 

 concave, the hind border very obtusely angulate, scarcely produced 

 broad triangle in the middle ; the surface is of a light color, very minutely 

 and profusely punctulate, the hind borders faintly marginate, the margin 

 black and punctate. The elytra are more elongate than, and do not tap- r 

 so rapid! v as, in M. sanguinipennis ; they are of the color of the thorax, 

 even more delicately punctulate than it, with two small, short, black, longi- 

 tudinal, impressed dashes just outside the middle, and just before the end 

 of the basal third ; the basal edge of the elytra is marked in black, much as 

 the posterior border of the pronotum ; and the scutellum is small, owing 

 to the encroachment of the median prolongation of the prothoraz. 



Total length, 3.o" ini ; length of thorax, O.G mm ; of elytra, 2.5 mm ; 'breadth 

 of head, 0.75"""; of thorax in front, 1.2 nni ; behind, 1.45 mm ; of elytra at the 

 spots, 2.1 mm . 



Green River, Wyoming. One specimen, Nos. 3990 and 4015. 



Family STAPHYLINID> Leach. 

 OXYTELUS Gravenhorst. 



OXYTELCS PKISTINU8. 



PI. 5, Figs. 118-120. 

 OiyleluH pristinui Scndil., Bull. U. S. Geol. Geogr. Surv. Terr., II, 79 (1876). 



A single lairlv preserved specimen, but of which none of the append- 

 ages excepting tlie elvtra are viable. Apart from the labral prolongation, 

 which is as in other species of <K\telus, the head is snbquadrate, .-lightly 

 broader than loii-\ the eyes <-cciip\ ing the whole lateral outline and but 

 little convex ; the Mitiiral divisions of the under snrlacc >ho\\ through upon 

 the upper -ill-face u 1 1 id i i> exposed to view), obscuring .-oine\\ hat the parts 

 above. Til.' pr.ith'ira\ i, soni"wh:lt injured. Iril Was evidentlv Slthipl.ld 

 a little lu-oader than the head, u.-arlv a third broader than long, the front 



