chamberlin: west Indian chilopoda and diplopoda. 177 



P. clarus. The median dorsal stripe is much broader ; it is ochraceous 

 and is in part tinged with red. The upper part of the side of each 

 somite is brown, the brown area enclosing a light, areolated spot 

 about each repugnatorial pore and fading out ventrad, leaving most 

 of the side as well as the venter of the body pale and immaculate. 

 No distinctly separated second series of light dots below the upper 

 one, though the spots of the upper series may be prolonged ventrad. 

 Head and anterior somites paler than the following ones, typically 

 ha^'ing a dilute ochraceous cast. The antennae are dark, the legs 

 yellowish. 



Body narrowed toward both ends as usual, robust. 



Ocelli of usual type; upper or caudal one much the larger; black. 



The collum with anterior border margined below on each side. 

 A single striation toward each lower angle. 



Anal scutum somewhat exceeded by the valves; with the usual six 

 setigerous cones. 



Number of segments, forty-three. 



Length, 20 mm. ; width, 2 mm. 



77. Prostemmiulus robustus, sp. nov. 



Tijpe.— M. C. Z. 4,320. Cuba: Belona Oriente. C. T. Ramsden. 



This is a much darker species than P. cubae with the median dorsal 

 light stripe very much narrower, line-like, expanding into a small 

 spot at anterior end of each tergite. Dorsum black on each side of 

 the median pale line excepting along caudal border of each tergite, 

 where the color is reddish or ferruginous; a small light spot about each 

 repugnatorial pore. Sides lighter, brown or slightly chestnut with a 

 distinct black stripe along the suture and another along the caudal 

 border of each somite. In a number of the anterior segments following 

 the first four the black extends continuously from the dorsum down 

 the sides. First four segments and head pale ferruginous with vague 

 dusky markings visible under lens; head blackish above and between 

 the antennae, the area on vertex with numerous minute light dots. 

 Legs yellow. Antennae blackish. 



Ocelli black, strongly convex, the anterior proportionately larger 

 than in P. cubae, the caudal one more posterior in position, obviously 

 farther removed from the margin of the antennal socket. 



Collum above lower end on each side with two deep striae above 

 the margining sulcus and several shorter and weaker or obscure ones 

 .above these. 



