ABT. 10. WEST INDIAIT MILLIPEDS CHAMBERL.IN. 9 



U' Anal tergite surpassed by the valves. 



g^ Anal segment black; segments distinctly punctulate or strio- 



late Ik- vincenti Pocock. 



g.' Anal valves flavous or lurid or ferruginous; segments smooth 

 and polished, at least dorsally. 

 ft.* Each ordinary segment encircled about its middle with a 

 brown or bluish-brown band, the anterior and posterior bor- 

 der ferruginous ; anal valves ferruginous. 



E. bruesi Chamberlin. 



ft.' Each segment flavous on posterior side as far forward as the 



suture; a black mark in middorsal region, often with the 



others giving the effect of a median dorsal black stripe; 



anal valves flavous or lurid R. cockerelli Pocock, 



e.' General color yellow with a uedian dorsal black band and also a 

 black band on each side at level of pores R. sabulosus Pocock. 



RHINOCRICUS ARBOREUS (Sausinre). 



Julus arhoreus Saussure, Linnaea ent.. 1859, vol. 13, p. 331. 



Locality.— CulobTn (A. Busck, February, 1899). 



The specimens are darker than those seen from St. Thomas, but 

 the legs do not have the reddish tarsi present in the following Porto 

 Rican form. 



RHINOCRICUS ARBOREUS KRUGII Kargeh. 



Julus arhoreus Saussuee, Linnaea ent., 1859, vol. 13, p. 331. 

 Spirobolus {RJdnocricus) arhoreus, var. krugii Kaksch, Zeits. naturwiss., 

 1881, ser. 3, vol. 6, p. 9. 

 Localities.— Vorio Rico: Near El Yunque (C. W. Richmond, Feb- 

 ruary 22, 1900) ; Rio Piedras. 



This variety is verj' close to the typical form as it occurs on St. 

 Thomas, the type locality. I have examined a considerable number 

 of specimens from the latter locality and find them to lack th^ 

 abruptly lighter, ordinarily reddish, tarsi characterizing adults of 

 the Porto Rican form. The difference in the depth of coloration 

 of the body pointed out by Karsch is not so constant. Mr. R. Cot- 

 ton reports this form as feeding on the purple scale {L. heeki) of 

 citrus trees. 



RHINOCRICUS ARBOREUS GUNDLACHII Karseh. 



Spiroholus {Rhinoericus) gundlachii Karsch, Zeits. naturwiss., 1881, ser. 



3, vol. 6, p. 9.) 



Localities.— Forto Rico: Near Pueblo Viejo (L. Stejneger and 



C. W. Richmond, February, 1899) ; El Yunque, on Catalina plant 



(February 2, 1900, L. Stejneger) ; Manati (December, 1899) ; Vega 



Baja (December, 1899). 



