66 ON NEW AND RARE BRITISH ARACHNIDA. 



that between them and the hind-laterals. The anterior row has 

 the convexity of its slight curve directed forward. The fore- 

 centrals are separated by less than half an eye's diameter from 

 each other and by a diameter from the fore-laterals. Each 

 lateral pair is seated on a rather strong tubercle, the fore-laterals 

 being the -largest. The four central eyes form a quadrangle 

 whose anterior side is much the shortest, but its length rather 

 greater than its width behind. 



The Legs are moderately long, 4, 1,2, 3, similar in colour to 

 the cephalothorax, and furnished with hairs and a very few 

 bristles. The coxae of the fourth pair are specially furnished for 

 stridulating purposes, described further on. 



The palpi are short, similar to the legs in colour. Cubital 

 and radial joints about equal in length, the radial much the 

 strongest and enlarged at its fore extremity, produced on its 

 inner side into a strong, curved, rather hooked tapering 

 apophysis, whose point is directed outwards. On the outer side 

 of the radial joint are some strongish bristly hairs of different 

 lengths ; digital joint of moderate size, short, oval, furnished 

 with hairs, the strongest of which are at the extremity. Palpal 

 organs prominent and complex. 



Fakes moderately strong, divergent at their extremities. 

 Colour like that of the cephalothorax. 



Maxillae, labium, and sternum suffused with blackish-brown. 



Abdomen short, oval, black, thinly covered with very short 

 hairs. The spiracular plates form a strong convexity, trans- 

 versely rugulose, their surface apparently broken up into a kind 

 of network of slight chitinous edges. A sharp corneous point at 

 the inner side of the fore "extremity of the coxae of the fourth 

 pair of legs is in a position to act upon the chitinous edges, and 

 no doubt, as has been conjectured, furnishes a stridulating 

 apparatus, probably used for the purpose of sexual attraction. 

 This apparatus occurs in both sexes ; but the corneous point on 

 the coxae is less sharp in the female. 



Female similar to the male in size and colour and other 

 general characters. On the upper side of the abdomen some 



