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Show 81 . oLength, 5mm-; breadth, 1.52mBL; length of head, Mma- j breadth of same, .96°*; length of prothorax, 1.12"*; breadth of same, 1.24 ™ * j length of elytra, 2.85DU*; breadth of same, .76mm-; length of antennaB, 1.6mra; of sixth joint of same, . IS"""- 13. Corymbites velatu*.- A single specimen, with its reverse, was fonnd by Mr. Richardson west of the Green River crossing, Wyoming. The bead and prothorax are gone, bnt both upper and under surface of the rest of the body, including the elytra, may be seen in each impression with nearly equal distinctness. The insect appears to have been about the size of C. medianus ( Germ.), bat more closely allied in form to ft * plenden8 ( Ziegl.). The legs have been destroyed, but the middle and bind coxal cavities may be seen. The elytra are of the length of the abdomen, acutely angled, almost pointed at the tip, and famished near the outer edge with a broad and shallow furrow, whose outer limit is abrupt and thus well marked. Besides this the elytra are faintly and distantly striate, with five or six rows of striae, and the meso-and meta- sternum are very delicately granulate. Length of fragment, 6mm; breadth, 3mm; distance between anterior edges of middle and hind coxqe, 1.75nun. 14. Oxygonus mortuus.- A single elytron, and its reverse, were obtained by Professor Denton, at Fossil Canon, White River. It is slender, the humeral angle well rounded, the outer edge apparently a little marginate; it is almost equal until near the tip, when it tapers to a point. This peculiarity leads me to refer it to Oxygonus, although the apex is not produced so much as in recent species of that group. It is famished with eight equidistant, rather strongly- impressed but delicate striae, that nearest the suture almost incroaching upon the margin; these striee are equidistant anteriorly and in the middle, but posteriorly they converge toward each other. Length of elytron, 4.55 ™ ; breadth, 1.72n> m; distance of stri » apart, 15. Chauliognathus pristine*.- A single specimen, with its reverse, was obtained by Mr. T. L. Mead at Castello's ranch, South Park, Colorado. It is very fairly preserved, and presents a dorsal view of the insect, with the left elytron and wing partially expanded. The head is rather small, rounded, the front extending considerably beyoud the large eyes. The antennae are about as long as the elytra, and apparently consist ot twelve joints, most or all of which are similar to one another, cylindrical, about three times as long as broad, and scarcely smaller at the basal than at the distal extremity. The prothorax is small, scarcely larger than the head, the anterior border rounded. The elytra are slender, square at the shoulder, each independently rounded and slightly tapering at the apex, not reaching the tip of the abdomen. The abdomen, which tapers posteriorly, appears, however, to be unnaturally produced; more than four segments can be counted beyond the unexpanded elytron. The wings are as long only as the elytra; the legs are slender, but the tarsi are indistinguishable. But for the brevity of the elytra, there would be little doubt that this insect should be referred to Chauliognathus. It has the general appearance, also, of a Malthinus or a Malthodes, but the wings are not exposed when the elytra are closed, and the insect is much larger than the living species of these genera. Heer has described, from Oeningen and Kadoboj, several Telephone! ® , but none so large as this, unless it be his Tele-phoruB Qermarii. Our species has much the general appearance of his figure of Lytta JSsculapii, but the structure of the antennae forbids its reference to that group. No. l 6 |
