54 



Characters of the family. 



Distribution. Ceylon ; Himalayas from Kashmir to Assam ; 

 Burma, Malacca, Sumatra, Java, Borneo, and Celebes. 



The genus ChelwuacJms was based upon a character occurring in 

 an immature individual ; Uromaclms upon the peculiar form of 

 vesicle found in the male of the species described below as Chcerilus 

 pictus. 



Synopsis of Indian Species. 



a. Hand furnished with only five keels, three 



above and two bordering the underhand 

 below ; last abdominal sternum with four 

 granular crests ; crests on band marked 

 with & single row of shining granules, 

 which are much more conspicuous than 

 those covering the rest of the surface ; 

 length of fingers and granulation of cara- 

 pace as under b' C. tricostatus, p. 59. 



b. Hand furnished with seven keels (in addition 



to a weak crest on its inner surface), five 

 on its upper surface and two bordering 

 the underhand below ; last abdominal 

 sternum without crests ; granules on keels 

 of hand small and close-set, not or hardly 

 larger than those covering the rest of its 

 surface. 



a'. Ocular tubercle and anteocular area of 

 carapace closely covered with granules ; 

 fingers very short, the movable strongly 

 curved, shorter than width of hand and 

 much shorter than carapace ; width of 

 immovable at base about two-thirds of 



its length C. ceylonensis, p. 02. 



V. Ocular tubercle and at least the posterior 

 half of the anteocular area of the carapace 

 smooth ; fingers longer, the movable 

 lightly curved, exceeding the width of 

 the hand, and at most only a little less 

 than the carapace ; basal width of im- 

 movable less than half its length. 

 a' 2 . Vesicle inflated, when viewed from the 

 side not passing gradually and without 

 constriction into the aculeus ; base of 

 aculeus subcylindrical, much narrower 

 than adjacent portion of the vesicle 

 and much longer than wide. 

 a 3 . Chelae long ; humerus, brachium, and 

 underhand subequal to or longer 

 than the carapace ; pectines large, 

 their length from base of shaft to 

 tip of apical tooth aboiit as long as 

 patella of 3rd leg. 



*. Width of 1st caudal segment ex- 

 ceeding length of 4th ; 2nd caudal 

 segment longer than wide ; 



