of the Genus Selenocosmia. 523 



greater part of the length of tlie anterior surface of tlie coxa, 

 the bacilla being- arranged in comparatively few rows (fig. 1). 

 Measurements in imn. Length of cephalothorax 20-5, of 

 sternum 9, of mandibles 11, of first leg 58, of second leg 51, 

 of third leg 47-5, of fourth leg 60-5, of stridulating-area of 

 maxilla 5-5; breadth of cephalothorax (at the middle) IG'a ; 

 breadth of cephalothorax (anterior edge) 11-75 ; breadth of 

 sternum 7, of mandible 5 ; greatest breadth of stridulating- 

 area 1'5. 



Fig.l. 



Anterior surface of the coxa of the maxilla of Selenocosmia Stalkeri. 



Hah. A single female specimen was collected bj Mr. W. 

 fitalker at Alexandria, Northern Territory of South Australia 

 during the month of December 1905. The specimen was 

 presented to the British Museum by Sir William Iiiorani 

 and the lion. John Forest. 



Collector's note : — " Hole driven in very hard ground • 

 about 1 foot iu depth and slightly chambered." 



Remarks. This new form differs from S. Stirllngi in that 

 the posterior sigilla are further removed from the posterior 

 margin of the sternum and that the fovea of the cephalo- 

 thorax is less strongly procurved. It also differs from that 

 species in the shortness of the hair which clothes the legs and 

 in the relative size and position of the eyes. The structure of 

 the stridulating-area also affords a character of some import- 

 ance. IS. Stalkeri differs from S. vulpina chiefly in the 

 characters presented by the eyes and in the bacilla of the 

 stridulating-area being stouter, and from S. crassipes 

 S. strenuus, and S. validus apparently in the relative length 

 of the legs. 



Selenocosmia himalayana^ Pocock. 

 Colour. Cephalothorax greyish brown ; body and legs 

 black ; dorsal surface of coxae and trochanters of the leo-s 

 together with their patellse, white or greyish white and tino-ed 

 with yellow ; abdomen dorsally griyish brown or dark iu 

 colour. 



30* 



