chamberlin: west Indian chilopoda and diplopoda. 213 



excepting a very narrow stripe on the caudal margin and the anal 

 valves also black. The head is dorsally crossed with a close network 

 in black, a similarly marked area also existing mesad of the lower 

 part of each eye; elsewhere the head is dusky or black excepting the 

 labrum. Legs and antennae flavous. 



The somites caudad of the suture are essentially smooth. In front 

 of the suture above they are sparsely punctate while on the sides and 

 adjacent to the furrow in which the suture lies there are the character- 

 istic circular and semicircular, fine impressions, while away from the 

 furrow these are only obscurely indicated. Across the dorsum in the 

 furrow is a series of coarse punctae and impressed lines. 



The collum strongly narrowed down each side as usual. Caudal 

 margin incurved a little above the lower end. Strongly margined in 

 front and below, the sulcus below somewhat double. 



The anal valves are mesally margined but are not nearly so strongly 

 elevated and compressed as in T. frater, while the margining sulcus 

 is more distinct than in any of the other West Indian species. 



In the male gonopods, aside from the important diiferences pre- 

 sented in details of the posterior pair, the median plate is at once seen 

 to be conspicuously different from that of T. lumbricinus, for instead of 

 presenting a triangular distal region this part is oblong, and distally 

 broad and truncate or slightly convex. 



Number of segments, forty-eight. 



Diameter, 3 mm. 



150. Spirostrophus naresi (Pocock), 



Spirobolus naresii Pocock, Ann. mag. nat. hist., 1893, ser. 6, 11, p. 252, pi. 16, 



f. 4-4b. 

 Trigoniulus naresi Brolemann, Mem. Zool. soc. France, 1900, 13, p. 94, pi. 6, 



f. 14.1 



Habitat. — Guadeloupe: Basse Terre, Feb. 16, 1895 (De Dalmas).^ 

 This is an East Indian species and^ was probably introduced with 

 timber. 



Nemasomidae. 



150a. Nemasoma trinidadense, sp, nov. 



Type.— M. C. Z. 4,449. Trinidad: Guacharo Cave. "In nest 

 material." F. ^Y. Urich and C. B. Williams. Paratypes.— M. C. Z. 

 4,450, 4,451. Trinidad: Port of Spain. R. Thaxter. 



