OCR Text |
Show 374 REV. O. P. CAMBRIDGE ON N E W DRASSIDES. [June 2, to discriminate them ; there is, however, a perceptible difference to be seen on comparison. Adult examples of each sex were found by myself near Alexandria, Egypt, under stones. Dr. Koch has pointed out to m e a good distinction between this species and P. conspersa (Cambr.) in the plumose character of the hairs on the sternum of the former, those on the sternum of the latter being of an ordinary kind. GNAPHOSA MARGINATA, sp. n. (Plate LI. fig. 3.) Adult female, length 3^ lines. This species is of ordinary form and general structure. The cephalothorax is yellow, with a fine marginal black line; on either side of the caput a curved blackish irregular line runs from the extremity of the hinder row of eyes, the two lines converging at the thoracic junction; the sides of the cephalothorax are clothed with pale yellowish-grey adpressed hairs and a dusky brownish, indistinct, irregular, longitudinal line. The eyes are in the usual position ; those of the hind central pair are pearl-white, oval, oblique, and each is nearer to the lateral of the same row on its side than the two are to each other ; the height of the clypeus appeared to be as nearly as possible equal to half the height of the facial space. The legs are tolerably strong and moderate in length, their relative length being 1, 4, 2, 3 ; they are similar in colour to the cephalothorax, and are furnished with hairs and spines; and each tarsus terminates with two curved pectinated claws, beneath which is a small scopula. The falces are rather short, strong, and conical in form ; they are of a red-brown colour, furnished with short bristly hairs in front; the fangs are short, and on the inner margin of each falx beneath the pointed extremity of the fang is a small patch of short spine-like erect bristles. The palpi are short, stout, similar in colour to the legs, furnished with hairs and spines, and terminated with a slightly curved pectinated claw. The maxilla, labium, and sternum are normal in form, and similar in colour to the legs (the two latter parts being a little the darkest). The abdomen is of a somewhat oblong-oval form, thinly clothed with hairs of a pale whitish-yellow colour, and irregularly margined on the upperside with black-brown ; the six normal impressed spots on the fore half are in the usual position and blackish in colour, and a longitudinal central oblong marking of the same colour runs between them ; following the last pair of these impressed spots, towards the spinners are four or five transverse angular bars or chevrons (with the vertices directed forwards) of a yellow-brown colour, the extremities of each ending in a blackish spot; the intervals between these chevrons are of a paler colour than the rest of the abdomen. The underside is immaculate; the spiracular plates are pale yellow |