388 PROCEEDINGS OF NATIONAL MUSEUM vol. 99 



width, anterior end abruptly rounded, posterior end gently tapering 

 back to nineteenth. 



Collum lens-shaped, not so long as two succeeding segments com- 

 bined, its posterior margin shallowly indented mesially; outer ends 

 directed slightly caudad. Collum and next segment without raised 

 edges on the keels. 



Dorsum coriaceous under low magnification; segments with wide 

 keels, slightly overlapping. Anterior corners rounded, posterior 

 corners angular, becoming caudally produced behind segment 15; 

 dorsolateral edges of most keels raised into ridges which are broader 

 on poriferous segments; repugnatorial pores dorsal in position, lo- 

 cated near the middle of the swelling. Keels of segment 18 almost 

 enclose those of 19. 



Anal segment triangular in dorsal aspect, longer than broad, its 

 basal width less than distance between keels of segment 19, truncate 

 distally, bearing a few terminal setae. Anal valves slightly inflated, 

 glabrous, unsculptured. Mesial edges produced into the usual ridges. 

 Preanal scale broadly triangular, almost semicircular, with one termi- 

 nal and two lateral tubercules, latter very small. 



Bases of last pair of legs narrowly separated. No sternal or coxal 

 armature, trochanters and femora with medium-sized spines. Tarsi 

 with strong terminal claws, distal podomere very hirsute. Coxae of 

 second pair of legs of male with low rounded knobs. 



Gonopods of male large and conspicious, in situ lying parallel and 

 directed cephalad between bases of seventh pair of legs. Telopodite 

 a slender flattened blade, bent cephalad and mesiad, lateral side with 

 a large lobe and tooth ; tip of blade truncate. Base of telopodite with 

 an oblique transverse cephalic ridge, which terminates mesiad in a 

 large bifurcated spine; a large lateral setiferous shoulder. 



Dorsum black in life, with caudolateral two-thirds of keels, anterior 

 edge of collum, and tip of anal segment reddish orange. Posterior 

 margins of keels with tinge of yellow. Underparts generally yellow- 

 ish tan, with legs becoming brighter distally. Head brown, antennae 

 and edges of labrum lighter brown. 



Types specimen. — Male holotype in the U. S. National Museum, 

 No. 1809, collected by Hobbs and Wilson on July 12, 19-17. 



Type locality. — Near Pineville, Wyoming County, W. Va. Accord- 

 ing to field notes, the species was associated with a form of Brachycyhe, 

 in beech woods. 



Remarks. — In color, size, and general configuration of the male 

 gonopods, this species is quite close to S. conclusa Chamberlin from 

 Altapass, Tenn., of which it may prove to be a subspecies. From 

 conclusa, furcifera differs in the broader telopodite blade which lacks 

 spines or teeth on the lateral margin, and in having the basal spine 



