OCR Text |
Show 87 front of pro thorax, and all the legs gone, and the elytra a little broken. The prothorax is profusely and uniformly pitted with moderately shallow pits, averaging .06ram in diameter; the elytra are traversed by lon-gitadinal costae, five of which are much more prominent thau the others, with sharp, unbroken edges and equidistant from one another, the oute*- ones in close proximity to the sutural and outer edges; the other cost ® are obscure, slightly elevated, rounded, broken to a greater or less extent into raised points; midway between the first and second prominent costse ( counting from the outer margin) there is fin exactly similar prominent costa on the basal third of the elytron; the prominent costae are 2mm apart. Length of the prothorax, .88min; height of same, 1.04mm; length of elytron, 1.96mm; breadth of same, 1.08mm. 30. Eurhinus occultus.- Three specimens of this species were found by Mr. Mead, near Castello's ranch, South Park, Colorado. It seems to belong to the Baridiides of Lacordaire, and in general appearance more resembles the species of the genus Eurhinus than those of any other group known to me; it is, however, smaller than they, and it may have greater affinities with the Ceutorhynchides. In any case it seems to be a strictly American type. The first specimen exUibits only the upper surface of the body with a portion of the rostrum. Nothing can be seen of the head excepting the base of the snout, which is slender ( perhaps slenderer than usual for Eurhinus), with two longitudinal furrows upon the upper surface occupying, together, nearly the whole width of the rostrum. The prothorax is tumid, with sides subparallel close to the posterior extremity, but immediately beyond narrowing rapidly, but with convex outline toward the head; the surface is uniformly and very profusely punctate ( granulose on the stone, which is a cast), the punctures averaging .04mm in diameter. The elytra are in place, together not much broader than the prothorax, parted in the apical third, each independently rounded, produced to a blunt tip, and provided with six equidistant, slightly raised slender ridges ( as now seen on the stone), .36 ™ °* apart, interrupted slightly at regular and short intervals ( so that the original doubtless had series of longitudinal stabs). Length of body, exclusive of rostrum, 6mro; of the visible part of the rostrum, .75min; breadth of same, .36mn\; length of prothorax, 1.4mm; greatest width of same, 315mm; length of elytra, 4.3mm; width of same, 1.75 ™ . A second specimen is very similarly preserved, and shows the same characteristics. In addition, however, the eyes and some of the legs may be seen. The former are very small, .16ram in diameter, and circular ; the legs are rather stout, the femora tumid; the width of the head at the eyes is .8min. A third specimen is much more poorly preserved; it is similar to the first, but in relief; more of the rostrum can be seen, and one of the hind femora, which is very stout, being 1.36mm long and .68ram broad. 31. Brachytarsus pristinus.- A single specimen was obtained by Mr. Richardson, with the other specimens found by him in Western Wyoming. It is very poorly preserved, andfragmentary. The head is roundish, with small circular eyes .08mrn in diameter. The prothorax is sub-quadrate, considerably larger than the head, and nearly as broad as the hody at the base of the elytra; the latter are broken. Length. of fragment, 2.1mm; breadth of same, .84mm; length of head, • 30*"; breadth of same, .4n, m; of thorax, .64mm. O |