70 ON NEW AND RARE BRITISH ARACHNIDA. 



Adults of both sexes were found at Hexham by Dr. A. R. 

 Jackson. They are identical with the spider described and 

 figured by M. Simon, I.e., of which I have an example received 

 in 1872 from M. Simon ; but whether they are identical with 

 Dr. L. Koch's species does not seem to me quite certain. The 

 type of the latter (if still in existence) may be in the Imperial 

 Museum at Vienna, and, so far as I am aware, no other 

 authentic example has ever yet been recorded. The spider I 

 have described now certainly does not very well accord with 

 drawings of his type sent to me by Dr. L. Koch in 1869. 



Trochosa postuma, sp. n. PI. B., Fig. 25. 



Adult female, length ^\ lines. 



Cephalothorax oval ; lateral marginal impressions at the caput 

 slight. Colour yellow-brown with two longitudinal lateral 

 darker bands, formed by patches indicating the normal thoracic 

 indentations, and leaving between them a central pale yellow- 

 brown stripe, tapering to its hinder extremity ; there is also a 

 narrow sub-marginal brownish stripe and a blackish marginal 

 line. 



Eyes normal. The four posterior eyes form nearly a square, 

 whose fore side is shortest. The anterior pair of these eyes are 

 largest, and are separated by rather more than a diameter's 

 interval. The four small anterior eyes form a slightly curved 

 line ; rather shorter than the two largest above them and the 

 convexity of the curve directed forwards ; the two centrals are 

 the largest, and separated from each other by an eye's diameter, 

 or less than that which separates them from the lateral. 



The legs are of moderate length, 4, 1,2,3; colour pale yellow- 

 brown ; the femora indistinctly annulated with darker brown. 



The palpi are similar to the legs in colour. 



The maxillae, labium, and sternum yellow-brown. 



Abdomen shrunken, deposition of ova having evidently taken 

 place ; its colour is dull yellow-brown, with faint indications of 

 the ordinary Lycosid markings. The genital aperture is of 



