chamberlin: west Indian chilopoda and diplopoda. 237 



central area on each metazonite, this area subquadrate in outline and 

 completely enclosed, not triangular and lying against the caudal 

 margin as in A. vincenti. The eighteenth and nineteenth tergites 

 either solid black or deep chocolate, or the eighteenth with a much 

 smaller central light dot. The last tergite deep colored excepting the 

 process which is yellow. The head is solid black or deep chocolate 

 between the antennae excepting for a germinate light spot; the upper 

 surface of head closely areolated in dark over a paler ground. Legs 

 yellow, the antennae somewhat darker. 



In the gonopods of the male the proximal division is much broader, 

 subtriangularly narrowed distad as seen from below. The middle 

 process narrowly blade-like, curving distomesad and crossing at the 

 tip the one from the other gonopod. Dorsal prong much more slender 

 than the others. 



Length (male type), 22.5 mm.; width, 2.8 mm. The females much 

 more robust, an average female paratype measuring 25 mm. in length 

 and 4 mm. in breadth. 



200. Antillodesmus vincenti (Pocock). 



Odontopeltis vincenti Pocock, Journ. Linn. Soc. Lond., 1894, 24, p. 514, pi. 39, 

 f. 4-4d.i 



Habitat— St. Vincent (H. H. Smith) .^ 



CuBODESMUS, gen. nov. 



In this genus the upper or anterior branch of the male gonopods is 

 strongly narrowed from near the middle distad and ends in a slender 

 blade which may be straight or weakly curved but not coiled. The 

 principal or lower branch is curved ectad or even subgeniculate above 

 the distinctly separated femoral division ; it bears distally three short 

 and often spiniform processes, two of which are suberect while the 

 most dorsal curves more or less mesad. 



Dorsum smooth. Keels high, with caudal angles broad and, ex- 

 cepting the most caudal, subrectangular or but slightly produced. 

 Caudal margins smooth. 



Anal tergite triangular, tip more or less decurved and narrowly 

 truncate. 



Genotype. — C. ramsdeni, sp. nov. 



