94 SECOND YARKAND MISSION. 



The palpi are moderately long, and similar to the legs in colour, deepening to a brownish 

 hue on the last two joints. 



The/aloes are moderate in length and strength, slightly divergent, perpendicular, of a 

 yellow-brown colour, and clothed with bristly hairs. 



The maxilla and labium are of a paler hue than the falces, and the sternum is heart- 

 shaped and similar in colour to the legs. 



The abdomen is of a rather shortish oval form. On the upper side is a troad, longitudi- 

 nal, pale-yellow band sharply dentated on its hinder half ; the fore part of this band contains 

 the normal longitudinal marking, of a slightly clearer colour, and faintly defined by a broken ; 

 brownish, indistinct line, and its hinder extremity is truncated. Some other indistinct, fine, 

 brown, broken, angular lines on the hinder part, indicate the ordinary chevrons. On each 

 side of the median dentated band, and, in fact, defining it, is a broad brown band diffused in 

 scattered spots a little over the sides ; the under side is immaculate. The genital aperture is 

 small, but of a characteristic form. 



An immature male exactly resembled the female. 



Hah. Yarkand and neighbourhood, November 1873; Kashghar, December 1873; 

 between Yangihissar and Sirikol, March 1874 ; Yangihissar, April 1874 ; road from Yarkaud 

 to Bursi, May 28th to June 17th, 1874. 



BOKBE, Genus Nov. 



I am induced to form this new genus for the reception of four remarkable JLycosids, one 

 received from Sinai, and described (P. Z. S., 1870, p. 822, pi. 1., fig. 3) as a Lycosa 

 (L. pralongipes, Cambr.), another from the present collection, a third, L. ungulata, Cambr. 

 Spiders of Egypt, Proc. Zool. Soc., 1876, p. 603, and a fourth, L. arenaria, Sav., Egypt. These 

 (or at least three of them, for L. arenaria, Sav. is unknown to me, except from Audouin's 

 figure and description, which do not detail the special points under consideration, though I 

 have but little doubt of its possessing them), though exactly agreeing in several peculiar 

 points of structure, are quite distinct species. The points in which they differ from Lycosa, 

 Trochosa, and Tarentula may be seen from the following diagnosis of generic characters. 



Cephalothorax oval, truncate before, and strongly constricted on the lateral margins of the 

 caput ; the normal indentations, especially the one dividing the caput from the thorax, are 

 strong, and the upper side of the thorax on each side of the normal longitudinal indentation 

 is gibbous, so that there is, when the spider is looked at in profile, a strong angular depression 

 between the caput and thorax, the lateral thoracic margins being much depressed. 



The eyes, as regards their general position, are like those of Lycosa, &c., but those of the 

 second row have their vertical axes directed very nearly straight forwards, that is to say, 

 scarcely at all upwards, though a little outwards ; in this respect there is a marked approach 

 to Dinopis, the facies being very vertical. 



The legs are long and attenuated, especially those of the fourth pair. Two parallel rows 

 of spines run throughout the under side of the tibiae, metatarsi, and tarsi ; at the fore end of 

 each tarsus there is the appearance of a kind of short obsolete, or fixed, joint. It has 

 apparently no movable articulation, but there is both a visible constriction and a kind of 

 suture as though of a joint either consolidated by disuse, or in process of development towards 

 a perfect supernumerary joint such as we find in Hersilia. The superior terminal claws are 



