176 bulletin: museum of comparative zoology. 



75. Prostemmiulus clarus, sp. nov. 



Type.— M. C. Z. 4,311. Haiti: Jacmel. Paratypes.— M. C. Z. 

 4,312-4,317. Haiti: Diquini, Grand Riviere, Furcy, Manneville. 

 W. M. Mann. 



In this species there is a distinct, sharply marked median dorsal 

 stripe of light color which is continuous throughout the length, or 

 may be broken up into spots anteriorly as in P. covipressus. There is 

 a series of light spots along each side and a series of smaller light dots 

 above this over the subdorsally placed repugnatorial pores. The 

 under surface of the somites ectad of the legs is pale. Anal scutum 

 and valves dark. 



The body is robust. It is narrowed obviously both cephalad and 

 caudad. 



Ocelli strongly convex, the caudal one much the larger. 



Collum strongly convex. Anterior margin mesally convex, slightly 

 incurving on each side caudad of the antennae. Low down on each 

 side two strong striae, — not presenting three keels as in P. covipressus. 



Anal scutum equalling the valves, bearing on each side three 

 setiferous papillae and a median papilliform process as well. Anal 

 valves with mesal margin considerably elevated, hirsute. Anal scale 

 with caudal margin slightly emarginate at middle. 



The male gonopods are obviously different from those of P. com- 

 pressvs and P. wheeleri. The mesal basal processes of the anterior 

 gonopods are relatively much shorter than in P. wheeleri and are not 

 distally acute and with tips curving ectad as in P. compressus. The 

 intermediate process on each side curves caudoectad behind the 

 principal plate and is curved at the tip. The principal plate is not 

 concave along its distal margin as in P. covipressus. Each posterior 

 gonopod is much broader than in either of the other species mentioned 

 and projects much beyond the first. 



The male is much more slender than the female. 



Length of female, 15 mm.; width 2 mm. Length of male type, 

 about 12 mm. ; width 1.2 mm. The maximum female is 20 mm. long. 



76. Prostemmiulus cubae, sp. nov. 



Type.— M. C. Z. 4,318. Paratype.— M. C. Z. 4,319. Cuba: 

 Guantanamo. C. T. Ramsden. 

 This species differs strikingly in coloration from P. covipressus and 



