chamberlin: west Indian chilopoda and diplopoda. 233 



are some elevated areas or tubercles commonly not crowded and 

 sometimes projecting as dentiform angles at the caudal margin; 

 more sparse areas or tubercles on anterior part of plate may be present. 

 Keels high, the dorsum low, much as in Polydesmus. 



Pores normal, occurring on somites five, six, nine, ten, twelve, 

 thirteen, and fifteen to nineteen. 



Last tergite triangular, with narrowed cauda posteriorly. Anal 

 valves mesally margined. 



Genotype. — C. hruesi, sp. nov. *■ 



188. Caraibodesmus bruesi, sp. nov. 



Type. — M. C. Z. 4,507. Jamaica: Liguanea Plain, November- 

 December, 1911. C. T. Brues. 



In coloration nearly the same as C. verrucosus, the prozonites being 

 dark chocolate-brown as are also the metazonites in a band across 

 their anterior border but extending only on the proximal portion of 

 the keels, the metazonites elsewhere yellow. Head chocolate-colored 

 above level of antennae, a narrowed pointed tongue of the same color 

 extending down between the antennae, and a dark tongue also on 

 each side extending from the ectal side of the antenna a short distance 

 mesoventrad. Head elsewhere yellowish. Legs yellow and anten- 

 nae brownish yellow. Venter j^ellow. 



At once separable from C. verrucosus in having no lateral marginal 

 serrations on the keels of the eleventh and twelfth somites whereas 

 there are prominent teeth in the latter as well as in a quite different 

 tuberculation of the dorsal surface, the areas outlined caudad of the 

 suture being large and low, not projecting as distinct caudal teeth, 

 and the surface elsewhere not densely finely tuberculate. 



The gonopods differ from those of C. verrucosus at a glance in that 

 the principal branch is much more slender, slightly narrowing distad 

 rather than expanding and curving stYongly ectad at the distal end. 

 Toward the distal end of the femoral region expanded mesad and 

 then in contact with the other gonopod. The lesser branch arises 

 mesodorsad of the principal one and extends distad to the middle of 

 its expanded femoral region. 



Length, 26 mm.; width, 3.25 mm. 



