LITHOBIUS DUBOSCQUI, Brolemann. 293 



long, the last equal to about the length of the two preceding 

 together. . . . Ocelli always three in number, disposed in a 

 horizontal line, the posterior ocellus being the smallest and the 

 following the largest. Coxae of poison-claws longer than broad, 

 with a very distinct median furrow ; armed with 2 + 2 small 

 but nevertheless well-formed and sharp teeth. All scuta mar- 

 gined laterally. . . . 



The two last pairs of legs are short, very stout, and without 

 furrows or apophyses in the male. Coxa? unarmed. 



Armature of fourteenth pair Q 1 2 ' 1 ' ^_ Q Q claw double. 



Armature of fifteenth pair k~y~ i ± ' Q claw double. 



Coxal pores small, circular . . . disposition generally as 

 follows :— 1. 2. 2. 2 or 2. 2. 3. 2 (exceptionally 2. 3. 3. 3 in one, 

 and in another 1. 2. 2/3. 2.). 



External genital organs in the female armed with 2 + 2 very 

 strong and long spines, especially the outer pair, which are 

 sometimes a little curved outwardly. Claw (unguis) large, tri- 

 lobed, with the two inner "teeth" much more developed than 

 the third, which is frequently reduced to a pointed spine. 



It is recorded by Brolemann from various parts of France. 



I first collected specimens of this species from under stones 

 lying on or slightly embedded in loose rich soil on the Durham 

 banks of the Derwent near Blanchland, April, 1913, and in the 

 same month discovered it in the neighbourhood of Oxford and 

 Manchester. 



Dr. Brolemann informs me (in litt. April 28th, 1913) that the 

 species must now be known as Monotarsobius dubosequi (BroL). 



