AET. 10. WEST INDIAN MILLIPEDS CHAMBERLIN. 13 



the margining one. Anal scale broad and short, the caudal angle 

 very obtuse. Processes of coxae of legs of male as usual. 



Gonopods as shown in plate 5, figures 4 and 5. 



Number of segments, fifty-four. 



Length, about 30 mm., width, 2.5 mm. 



Locality.— Cwho.'. San Diego de los Bafios. One male. (April 

 17, 1900, Palmer and Riley.) 



Type.— Csit. No. 859, U.S.N.M. 



MICROSPIROBOLUS RICHMONDI, new species. 



Plate 5, figs. 1-3. 



General color greyish black, the color sometimes deeper caudally 

 just in front of the pale edge. A series of light ferruginous spots 

 on each side of the dorsum, these sometimes obscure. Legs and an- 

 tennae ferruginous. 



Eyes widely separated with ocelli in four or five transverse series ; 

 e. g., 5, 4, 4, 2, 1. Clypeal foveolae 4+4. 



Collum deeply margined below and up to end of eye in front; 

 lower corners rounded, with the intervening margin weakly convex. 

 Segmental sulcus distinctly impressed; on the sides at and below 

 level of pore consisting of a series of united short curved lines with 

 concavity caudad, but not openly angled or curved at level of pore. 

 A series of short striae just caudad of and united with the sulcus, 

 these succeeded below by larger striae reaching from sulcus to caudal 

 margin. 



Caudal angle of last tergite rounded, exceeded by the valves. 

 Anal valves smooth, mesal border evenly protruding but not set off 

 by margining sulcus or furrow. Anal scale broad, the caudal mar- 

 gin convex. 



Gonopods as shown in plate 5, figures 1-3. 



Number of segments, thirty-nine to forty-five. 



Length of female, 25 mm. ; width, 2.6 mm. Width of male, 2.2 mm. 



Locality.— Vovio Rico: El Yunque, 2,800 feet. (February 2(>-27, 

 1900, C. W. Richmond.) 



Type.— C^i. No. 860, U.S.N.M. 



Genus SPIROSTROPHUS Saussure and Zehntner. 



Myriapodes Madagascar, 1902, p. 150. (As subgenus of Spiro'bolus.) 

 Glosselns Cook, Proc. U. S. Nat. Mus., 1911, vol. 40, p. 163. 

 Cairibolus Chamberlin, Bull. Mus. Comp. Zool., 1918, vol. 62, p. 209. 



Examination of more ample material shows that the writer pre- 

 viously misinterpreted the posterior gonopods of the species placed 

 under Cairibolus and that they are trigoniulids rather than allies of 

 Micro spirololus. They conform to the East Indian Spirostrophiis, 



