OCR Text |
Show lower carince elevated, the former suddenly decreasing near the middle of the apical half of the leg. The* callosities of the head and pronotum, and the structure of the hind femora, separate this genus from any other American group known to me. X. coronata Scndd., may be considered the type. 40. Trachyrhachys aspera, nov. sp.- Summit of the liead between the middle of the eyes and backward furnished with many parallel approximate series of transverse rugce, divided longitudinally by a pair of slight and inconspicuous subdorsal sulca-tions; fastiginm with a very deep median transverse 8 ul cat ion, in front of the middle of which is a minute tubercle; frontal costa deeply sunken between the lateral foveola*; sulcus below this uninternipted ; whole bead profusely punotnlate. Subdorsal carina of the posterior portion of the anterior lobe of pronotum regularly crescentic, opening inward, posterior margin of the pronotum sharply angled. Light yellowish brown ; summit of the head fuscous; a dark fuscous stripe crosses the eye from the lateral carinas of the face to the back of the head, broad and directed downward iu front of the eye, slender and horizontal behind it; the lower posterior corner of the cheeks are also dusky, and the middle of the face is more or less obscured with it; basal half of the antenna) of the general color, beyond deepening into dark fuscous. Pronotum , more or lees infuscated, especially on the posterior lobe and on the subdorsal carina of the disk, the anterior lobe next the ocellar stripe of the head, and the neighborhood of a short, rather broad, oblique dash of yellow on the lower posterior part of the deflected lobe. Tegmina just reaching the tip of the abdomen, flecked with fuscous, mostly collected into median, post- median, and costal spots on the anterior half of the tegmina, the latter in the middle of the basal half, the lower apical third subhyaline: wings hyaline ( perhaps faint yellow on the basal half), with an arcuate, moderately broad, fuliginous belt, traversing the middle of the apical two- thirds, in the preanal area sending a broad, tapering shoot almost to the base, and accompanied by a few dusky iieck-ings at the apex, and a blackish fuliginous costal stigma, nearly half as long as the wing, from the middle of the wing outward. Hind femora with very obscure, broad, oblique, basal, and median brownish stripes on the outer face, and, on the upper face, basal, median, and post- median, darker, oblique, reversed blotches, edged with blackish ; hind tibise yellowish, with a broad, apical, dark fuscoii9 cloud; apical half of the spines black. Length of body, 2. imm; of antennas, bm, n; of pronotum^ 4.5mrn; of tegmina, 16.7mm; of hind tibiae, 9.5mm. 1 $, plains of Northern New Mexico, eastern slope, October 14- 31, Lieut VV. L. Carpenter. 41. Trachyrhachys coronata, nov. sp.- Fastiginm of the vertex bounded behind as well as in front by an oblique extension of the lateral carinas, which fork at the posterior limit of their parallel course; behind this the summit of the head is furnished with moderately conspicuous, oblique rugje parallel to the posterior bounding ridge of the fastigium/ the anterior set broken into tubercles: middle of the fastigium with a transverse, bent carina, as high as, and parallel to, the anterior bounding ridge of the same; behind the middle ojf the lozenge- shaped space posterior to it is a tubercle; the cartas of the frontal costa extend briefly into the front of the fastigium; in the middle of the expanded portion of the fron tai costa, between the lateral foveolae, is a slight longitudinal tubercle, and next the upper edge of the ocellus a transverse ridge breaking the sulcus. The subdorsal carinse of the posterior portion of the anterior lobe of the pronotum are irregular in height and direction, but in general their highest point,. with the slight elevations of the median carina on either side of the anterior sulcus, form a sort of quadrilateral; the rugosities of the disk of the pronotum are more elevated than in the preceding species, and more or less confluent, forming sharp, tortuous carinse; posterior margin of the pronotum slightly sinuous on the sides, the angle rounded. Pale cinereous, the markings of the head, thorax, and hind femora much obliterated by the mode of preservation of the single individual before me, but apparently as in the preceding species, excepting that the yellow dash on the deflected lobe of the pronotum is near the center of the lobe, short, small, and horizontal, with a dusky quadrate cloud above it. Tegmina extending much beyond the tip of the abdomen, cinereous, profusely sprinkled with large, roundish, dark fuscous patches, edged with black ; in the costal area are live such equidistaut spots, the innermost next the base a mere dot, the next nnited to the basal spot of the median area, the inner edge of the third and largest lying just beyond the costal angle; the median area has seven or eight such spots, equidistant, growing larger until close to the tip, the second and third from the base roundish, those beyond triangular or transverse and less distinct; the nlmar veins are yellowish, and below them is a basal cloud and a post- basal, rhomboid, p'alo fuscous spot; wings pale yellow at base, hyaline at tip, with a pretty broad, blackish fuliginous, arcuate band extending across the wing and curving next the border to the anal angle, its inner border crossing the middle of the wing; it sends a broad, tapering, rather abruptly terminating shoot half- way to the base in the preanal area, and just |