OCR Text |
Show 84 nished with a number of slight, slender, raised ridges, 0.34""° apart, which are probably the reverses of striae. In general form, the insect appears to have closely resembled Eudiagogus examinis Scudd., but differs from it conspicuously by its longitudinal eye. Dr. Le Conte has suggested to me that it may be an Anthribide, near Cratoparis. 22. Otiorhynchus perditus.- A single specimen, showing a side aspect, was obtained by Mr. Bichardson at the same locality as the last It differs from the species of Otiorhynchus, with which I have compared it, in not having the prothorax conspicuously smaller than the body behind it. The head is withdrawn into the prothorax, almost to the hinder edge of the eyes; the snout is short, stout, slightly curved, blnntlj rounded and rather tapering than enlarged at the tip, not quite so long ( measuring from the front edge of the eyes) as the length of the pro notum; the eyes are rounded, subtriangular, with a diameter equal to half the width of the snout, the central facets with a diameter of 0.027s111; the antennal scrobes are twice as long as broad, commencing at the middle of the snout and extending two- thirds the distance thence to its tip. The prothorax is equal, nearly as long as high, not tumid, rugulose. The elytra, which are not elevated at base above the prothorax, are simple, not very tumid, provided with about eight longitudinal slender rows, .3ma apart, of low, raised, rounded points, nearly as distant from one another as those of contiguous rows; midway between each of these rows is a very inconspicuous dull ridge. Fragments of the legs remain, which agree, as far as they can be made out, with the same parts in Otiorhynchus. In the general sculpturing of the elytra this insect is not very unlike 0. sulcatus ( Fabr.) Length, 8"*; of snout, beyond front of eyes, 1.28""; width of same, .75 » » • length of antennal scrobes, .32 mm; diameter of eyes, .46"""; length of pronotum, 1.8* 8, n; height of same, 2.28mB; length of elytra, 5.2om j width of same, 2.05""") length of fore femora, 1.8-\ 23. Entimus primordialis.- A single specimen, found by Professor Denton, at Chagrin Valley, White River, represents this species. Besides a crushed elytron there are only some indeterminate fragments of the neighboring parts of the body. The form and sculpturing of the elytron resemble those of the Brazilian diamond- beetle so closely that I place the species provisionally in the same genus, or until further remains are obtained. The insect must have been rather small for an Entimus, although it is the largest of American Tertiary Curculionida known to me. It is of about the usual size of the species of Otiorhynchus, and it is not at all improbable that it should be referred to the latter genus, some species of which have elytra with similar sculpturing and approximately the same form. The elytron is traversed by ten similar stout and coarse, longitudinal cost ® , most of which are broken np by transverse depressions into bead- like hemispherical prominences; at the tip of the elytron, however, and on the apical half of the inner two cost ® , this irregularity is nearly or quite lost sight of; the edges of the elytron, for about the width of one of the costse, is also smooth and depressed; the front border is sinuous, and the sutural margin appears the same on the stone, from the compression the elytron has undergone, which was sufficient to split it down the middle through half its length. Length of fragment, $ mm; greatest breadth of unsplit portion, 4"*. 24. Eudiagogus saxatilis.- Four specimens were obtained by Mr. Bichardson beyond the Green Eiver on the Union Pacific Railroad, Wyoming. One of these represents a nearly complete side view of the insect without other appendages than the elytra; another presents a similar appear ance, but even the elytra are gone, and the hinder edges of the posterior coxae are impressed upon the superior surface, giving the appear- |