chamberlin: west indian chilopoda and diplopoda. 189 



row light borders. Head dark. Anal scutum black at base, brown 

 caudally. Anal valves brown. 



CoUum not at all or only obsoletely margined below. Second 

 tergite extending a little below it, indented or excavated beneath. 



Anal scutum with surface highly coriarious, exceeded by the valves. 

 Valves distinctly compressed. 



Number of somites forty-seven. 



Length, 50 mm. ; width, 6.8 mm. 



100. Rhinocricus mediator, sp. nov. 



Tijpe. — M. C. Z. 4,414. Paratypes. — M. C. Z. 4,415. Haiti: 

 Furcy. W. M. Mann. 



This belongs with the scobinate species of Rhinocricus having but a 

 single suture on the somites and the anal scutum not prolonged beyond 

 the valves. In size it is smaller than R. domingensis, R. maltzani, 

 R. haitensis, and so forth, and larger than R. solitarius and related new 

 species above described. The suture in the anterior somites is strongly 

 marked across the dorsum but in the middle and posterior regions is 

 weak or obscure; it is distinctly sinuate about the pore. Scobina 

 continuing to well caudad of middle region of body. 



The collum is marginate along the anterior corner. The second 

 tergite extends much below its level and is flattened or also somewhat 

 excavated on anterior half. 



The antennae are very short. Head smooth and shining. Sulcus 

 distinct; interrupted near level of antennae. 



Anal scutum shining; crossed toward caudal region by two or three 

 weak wrinkles; narrowly rounded caudally. Much exceeded by the 

 anal valves which are compressed. 



The general color of the type is somewhat ferruginous. The somites 

 are banded with black, or a somewhat olivaceous black, this dark 

 color occurring along the anterior border and not extending back so far 

 as the suture. Anal scutum and valves somewhat olivaceous black. 

 Collum and head somewhat brownish ferruginous. Legs ferruginous. 



It is distinguished in having the upper branch of the posterior 

 gonopods lying close against the edge of the lower branch, long and 

 very slender. 



Length about 56 mm.; width 5 mm. 



