178 BRITISH SPECIES OF PHALANGIDEA OR HARVEST MEN. 



under side is white or whitish-grey. Each segment of the 

 abdomen has on the upper side a marginal row of minute sharp 

 denticulations, weakest, least regular and conspicuous on the pos- 

 terior segments ; a similar row also edges the posterior margin of the 

 thorax. The lateral edges of the cephalothorax are also armed with 

 sharp tubercles or denticulse, and a group of the same occupy each 

 side of the central line in front of the eye-eminence, with 

 occasionally a single one in the slightly hollow interval between 

 these groups ; others are also found irregularly placed on each side 

 of the cephalothorax. Just in the middle above the falces, beneath 

 the anterior margin of the caput, are two small but distinct 

 prominent teeth. 



The eye-eminence is of moderate size, about equal in length and 

 breadth. The two longitudinal rows of denticulse, with which it is 

 armed are 5-8 in number, and about equal in strength to those on 

 the caput in front of it. 



The falces are small in this sex, and have a small patch of 

 minute denticulss on the upper side of the basal joint. The palpi 

 appear to vary in length, in both sexes, but mostly so in the males. 



The legs have the femora of an angular shape, the angles armed 

 with rows of strong sharp denticulse. The tibise are also angular, 

 and similarly, but much less strongly and conspicuously armed. 

 The metatarsi have generally fewer or more false joints towards 

 their distal ends. The colour of the legs is pale yellowish to 

 yellow-brown. 



The genital plate is rather tapering, but slightly widened and 

 curvi-truncate at the fore extremity. 



The male, besides being smaller and having the abdomen smaller 

 in proportion to the size of the cephalothorax than the female, 

 has the angular dorsal band less well marked and often not trace- 

 able. The spiny armature also is stronger, the legs longer and 

 dark coloured, the palpi much longer and the falces larger, the 

 second joint being produced at its hinder extremity into a more or 

 less long, strong, pointed and slightly curved horn. The variations 

 in the strength of this horn are remarkable, and are, perhaps, 



