OCR Text |
Show 82 16. Sitodrepa defuncta.- A single elytron, with its reverse, was found by Mr. Richardson west of the Green River Crossing, Wyoming. It is very poorly preserved, more than twice and a half as long as broad, • equal until near the tip, which is rounded off; it is traversed by eight or nine very slightly impressed and delicate punctate striaB, . lmm apart. Length, 2.75ram; breadth, 1.06 ™ . 17. Spermophagw xivificatm.- Two specimens, reverses, but one showing more plainly the upper, the other the under surface, were brought by Mr. T. L. Mead from Castelio's ranch, South Park, Colorado. They are in an unusually good state of preservation. Bat very little of the small head can be seen, either upon the upper or the under surface ; the portion exposed is delicately punctured, the punctures being closely crowded, and father less than one- hundredth of a millimeter in diameter. The antennae show nine joints, whict) are together longer than the breadth of the prothbrax; the first and second joints are ovate, the remainder more or less obconical; the first four are of nearly equal length, and of about the same length and breadth; beyond, the joints are subequal among themselves, but much longer than broad. The prothorax. is crushed, and although not misplaced, it is difficult to determine its exact form, or whether or not it wholly concealed the head from above. It is more coarsely punctate than the head, the punctures being .025mm in diameter; the posterior border is broadly angulate, the angle rounded, the outer margin more or less rounded, and the whole prothorax broadest posteriorly. The elytra are very ample, equal, eaeh independently, * ery broadly and regularly rounded at the apex, which does not reach the tip of the abdomen; they are very distinctly bat narrowly punctato striate, in nine straight, equidistant complete rows, besides an auxiliary row next the outer margin, for a portion of the distance ; near the tip of the wing, the outer and inner rows curve toward the middle of the apex, and all fade out before reaching it; the entire border of the elytra is marginate. The femora, especially the hind pair, are stout; the hind tibiae are considerably shorter than the femora, and there are apparently, on one side, faint indications of the two long tibial spurs, with which the apex of the hind tibiae are armed in this genus. The abdomen is exceedingly short and broad, the apical segment pro trading a little beyond the others and well rounded. Length, 5.25 ™ m; breadth of prothorax, 2mm: of body at middle of elytra, 3.25mm; length of antennae, 2.2mm; of elytra, 3.75 ™ m; breadth of same, 1.35mm; length of middle femora, 1.05min; breadth of same,. 28mw; length of hind femora, 1.56mm; breadth of same, .48 ™ ra; length of hind tibiae, 1.02 """ j distauce apart of elytral striae, .265mm. 18. Bruchus anilis.- A single specimen was brought by Professor Denton from Chagrin Valley, White River. It consists of two elytra, in natural juxtaposition seen from above. They have a brown color, which is wanting in certain places, but in so irregular a manner that it is doubtless fortuitous; they are furnished with striae, but these, as well as all color, are entirely obliterated in the middle of the wing; this again is doubtless a defect of preservation, since the sutural edges of the elytra are similarly affected; the striaB are deep, sharply cut, straight, subequidistant, eight in number, fading out at the apex of the elytra. the space between them smootli and arched. Length of one elytron, 5mm; breadth of same, 1.9mm; distance of stinv apart, .45mm. ORYCTOSCffiTETES UOV. gen. This genus belongs to the group of Chrysomelida, of which Haltica wH. is the best known representative, the members of which are peculiar |