374 REV. O. P. CAMBRIDGE ON NEW 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 me 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 cephalo- 

 thorax, 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 pecti- 

 nated claw. 



The maxillce, 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 chev- 

 rons (with the vertices directed forwards) of a yellow-brown colour, 

 the extremities of each ending in a blackish spot ; the intervals be- 

 tween these chevrons are of a paler colour than the rest of the abdomen. 

 The underside is immaculate ; the spiracular plates are pale yellow ; 



