chamberlin: west Indian chilopoda and diplopoda. 219 



and the princiijal processes are attached more distad. The posterior 

 process is a mere rounded tubercle at the base of the anterior. The 

 anterior consists on each side of two slender chitinous needles as in 

 the preceding species. The posterior of these is much more slender, 

 straight throughout and is shorter, the tip reaching only to near the 

 distal geniculation of the seminiferous branch. The latter toward 

 the distal end is geniculate as usual, with no spur such as is present 

 in vincenti, the tip banding caudomesad and, in situ, crossing that of 

 the opposite gonopod. 

 Length up to 12.8 mm. 



162a. DocoDESMUS trinidadensis, sp. nov. 



Type.— M. C. Z. 4,474. Trinidad: Port of Spain. Roland 

 Thaxter. 



This species has much the general appearance and structure of 

 D. grenadae; but it is proportionately longer and has the dorsum 

 obviously more elevated and convex, with the keels more depressed. 

 The crenulations on the caudal margins of the keels are clearly more 

 acute and tooth-like. The coloration is somewhat similarly dark 

 but is more reddish, and a lighter geminate median dorsal stripe is 

 traceable though obscure excepting between the plates proper, where 

 it is very distinct. The last tergite has the lateral lobes proportion- 

 ately much larger, with the median one short and much broader with 

 the distal margin wide, slightly convex. 



Length, about 13.2 mm. 



163. Chytodesmus laqueatus (Karsch). 

 Cryptodesmus laqueatus Karsch, Mitth. Miinch. ent. ver., 1880, 4, p. 142. ^ 

 Habitat. — Cuba.^ 



164. Tridesmus sectilis Cook. 

 Brandtia, 1896, p. 21. ^ 



Habitat. — Porto Rico.^ 



