794 R. I. pococK 



lower and without granules, this low part less distinct at the 

 hinder end of the body; the posterior part of the cylindrical 

 half with a deep transverse groove; the anterior edge of the 

 keels with a very low basal shoulder; upper surface of the keels 

 feebly granular, except at their apices : keels at the anterior end 

 of the body strongly granular, tlie keels of the 19"' projecting 

 nearly as far behind as the apex of the tail, which is granular 

 throughout. Lower surface of the segments finely granular. 



Legs as in the other species. 



Length 17 mm., width 5. 



</•. With keels more elevated and more strongly curved 

 backwards. The sternum of the 6"' somite not excavated for the 

 reception of the copulatory feet, which are small (cf figure 3). 



Length 16 mm., width 5. 



Loc. North Chin Hills (Upper Burma). A large number of 

 specimens obtained by Lieut. E. Y. Watson. 



This species resembles the type of the genus, T. bicolor from 

 Sumatra, in having the anterior edge of the keels sulcate and 

 not lobate ; but in addition to the difference in colour, T. watsoni 

 may be readily recognised by its scarcely apparent basal shoulder 

 on the keels and by the conspicuous low smooth area on the 

 hinder half of the dorsal region of the segments. 



The three Burmese species of Trichopeltis may be recognised 

 thus : 



a. Anterior border of the keels margined but unarmed except 



upon the anterior angle; dorsal surface of the keel-bearing 



half of the segments low and without granules watsoni. 



b. Antei'ior border of keels not margined but dentate like the 



posterior border : the dorsal surface of the keel-bearing part 



of the segments uniformly granular. 



a* Keels strongly depressed, following the slope of the back, 

 the teeth smaller and more numerous (about 10-11 on 

 the hinder margin of the keels) feae. 



6' Keels less depressed; teeth larger, only about 6 or 7 on 



the hinder margins of the keels > • • doriae. 



