1G6 1^1'' A. H. Jackson on some 



the Cheviot Hills and the latter near London, botli many- 

 years ago. 



Both specimens are very much bleached, but the palpal 

 structure can be made out, and there is no doubt that both 

 are examples of P. ghhosa, Wid. Both appear to have been 

 rather abnormally pigmented when alive. 



Gentromerus suhacuta, Camb. 



Opistoxys suhacuta, Camb., List of British & Irish Spiders, 1900; id., 

 Proc' Dorset Nat. Hist. & Antiq. Field Chib, vol. xii., 1891, p. 92, 



pi., fig. 3. 

 Lcptj/phantes patens, Camb., Proc. Dorset Nat. Hist. & Antiq. Field 



club, vol. xxviii., 1907, pp. 139-140, pi. A, figs. 20-25 (male, not 



female). 

 Opiatoxys siibacuta, Camb., Proc. Dorset Nat. Hist. & Antiq. Field 



Club, vol. XXXV., 1914, p. 128, pi. A, figs. 19-20. 



I have examined the types of 0. suhacuta^ Camb., and 

 L. patens, Camb., male, and find that they are identical. 

 Mr. Cambridge has confirmed this, and his remarks will be 

 found in the last reference given above. 



The drawings on plate A, figs. 19 & 20, are quite rough 

 ones by myself. The type of 0. suhacuta is now unfortu- 

 nately destroyed, and the male described as L. patens is at 

 present the only example extant. The female of L. patens 

 turned out to be Leptyphantes pnlUdus, Camb. (see Proc. 

 Dorset Nat. Hist. & Antiq. Field Club, 1910, vol. xxxi., 



This species is a typical Centromerus, and there seems to 

 be no reason for considering Opistoxys as a British genus. 

 The following is the cha^totaxy of the species : — 

 Falces. — Anterior border bears three large teeth. Posterior 

 border bears four or five very small teeth very closely 

 grouped. 



Legs. — Femur i. : a spine on dorsum about the middle ; a 

 gpine on anterior border near the apex. 



Femur ii. : a spine on dorsum near middle. 

 Femur iii. & iv. : unarmed. 

 Patellae : one spine above on each. 



Tibige : two spines above on each. The first tibia bears, in 

 addition, an extra spine on the anterior border nearer the apex 

 than the middle. 



Metatarsi : unarmed in the type of 0. suhacuta. In that 

 of L. patens the first two each bore a very fine erect spine 

 near the middle. 



These may have been broken off in the other example, but 

 I saw this specimen first and did not look for their bases. 



