chamberlin: west Indian chilopoda and diplopoda. 241 



ing laterally below them. Labrum and lower sides yellow. Only the 

 process of anal plate yellow. 



Processes of nineteenth tergite very small; those of the eighteenth 

 abruptly larger but not nearly so large as in C. latior, being smaller 

 than those of the seventeenth. Dorsum smooth. A single serration 

 on each side in the usual position on somites three to seven inclusive. 



In the gonopods of the male an obvious difference from the other 

 species lies in the more broadly expanded middle region of the dorsal 

 branch, the two being contiguous in the region and diverging from this 

 level both proximad and distad. The distal or median process of the 

 principal branch is exceptionally short, distally rounded, and even 

 obliterated on right gonopod of type; the dorsal process is long, not 

 much narrowed distad, distally rounded, not at all or but slightly 

 curved, crossing the one from the opposite gonopod. 



Length (male type), 41 mm.; width, 5.7 mm. 



Thus considerably more slender than the previously described 

 species. 



205. CuBODESMUS PRiNCEPS, sp. nov. 



Type. — M. C. Z. 4,521. Cuba: Guantanamo, Mt. Libano, La 

 Union, under stones in woods, March 23, 1913. C. T. Ramsden. 



This is the largest of the known species. The dorsum is black with 

 the keels paler, obscure yellow, the light area narrower than usual. 

 The last tergite is dark throughout, or but obscurely paler distad, in 

 strong contrast with the other species. The first tergite is obscurely 

 paler only at the caudal corners of carinae, elsewhere solid black. No 

 trace of light marginal cross stripes. Pleural and ventral regions 

 brown. Anal scale with distal portion characteristically black. Head 

 black above, the dark area extending between antennae below which 

 it again widely expands nearly to the lateral margin. Labrum and 

 sides of face obscurely lighter. Legs proximally brown, distally 

 yellow. Antennae yellow. 



Caudal angles of keels in general less rectangular than in C. lafior, 

 most being weakly produced. Last processes small as usual, those of 

 the eighteenth keels somewhat smaller than those of the seventeenth. 

 Lateral teeth showing on fourth, fifth, and sixth tergites, obscurely 

 also on next two. 



