chamberlin: west Indian chilopoda and diplopoda. 217 



The general color of the mid-dorsal region is brown, but there is a 

 median longitudinal light stripe of which the part pertaining to each 

 tergite is subtriangular in outline with the apex caudad; the keels are 

 also pale with the lateral portion transparent. The antennae and 

 legs are light yellow. 



The body in the male is typically about four times longer than the 

 greatest width. The keels are horizontal and broad as usual; but 

 the feet when extended laterad show beyond the margins of the keels. 

 The first tergite has the semicircular anterior and lateral margin moder- 

 ately elevated so that the border above is somewhat concave; border 

 crossed by the usual transparent radial lines or sulci dividing it into 

 twelve areas. The keels in general are bent moderately forward, 

 with the anterior margin gently convex and smooth or very vaguely 

 crenulate though the emarginations are shallow and correspond to the 

 ends of sulci crossing the posterior border of the keel and dividing 

 it into areas. The posterior border of the tergite between the keels 

 is also crossed by similar sulci which are shorter and closer together, 

 the posterior margin correspondingly but more weakly crenulate. 

 Anterior corners of keels slightly obtuse, well rounded, the posterior 

 corners more angular, subrectangular, in the eighteenth and nine- 

 teenth produced strongly caudad as usual, in the others in going 

 forwards progressively less so. Lateral borders of keels divided by 

 cross sulci as usual into areas, each of which is represented by a low 

 convexity or crenation at the margin. On the keels of the second 

 to sixth somites inclusive there are three lateral crenations; on the 

 seventh four, and also four on all others excepting the eighth and 

 eleventh. An exceedingly small repugnatorial pore is present on 

 the usual keels (V, VII, IX, X, XII and the succeeding ones), while 

 what appears to be the duct leading to it may be seen more distinctly 

 in some specimens by transmitted light. The tubercles arranged as 

 usual, those of the submedian rows and one on each side near bases 

 of the keels being larger than the others. The last tergite is much 

 less distinctly trilobed than in D. vincenti, the lateral lobes being repre- 

 sented by a projecting tubercle of moderate size toward the base; 

 plate distally subtruncate, being slightly rounded. 



The basal lobe of the male gonopods is very large and rounded with 

 the processes springing from the mesal side of each and being in part 

 concealed thereby in lateral view. The posterior process on each 

 side is a short subcylindrical process about half as long as the anterior 

 one and mucronate at tip; much more conspicuous than in D. vin- 

 cciiti. The anterior process is a thinner, more chitinous blade bifur- 



