178 PROCEEDINGS OF THE NATIONAL MUSEUM tol. ui 



100 X); leg swollen but evidently not to the degree encountered in 

 some of the other genera; its setae are extremely long and straight. 



Post pedal segments: Gonopods apparently unipartite, lobate, well 

 separated. Pregenital sternite not obliquely excised as is usual in 

 the male geophilomorph, instead rather bandlike as in the female. 

 Male intromittent apparatus clearly disclosed lying doi-sal and internal 

 to and between the gonopods. Terminal pores absent. 



Paratype, apparently female, same collection data. The only 

 other specimen secured is a female (the intromittent apparatus 

 characteristic of the male seems to be absent), 8 mm. long, with 43 

 pedal segments. The female agrees closely with the foregoing descrip- 

 tion of the male holot3rpe. 



Ityphilus idaniis, new species 



Figures 7-12 



The two ballophiline genera for which the largest number of species 

 has been recorded are BallophUus and Ityphilus. The former is 

 evidently dominent in the Old World tropics, but has at least two 

 known neotropical species, and the latter seems to be represented 

 only in the tropics and possibly sub tropics of the New World. 



The present species falls clearly within Ityphilus, as it is now defined. 

 According to the published descriptions, guianensis Chamberlin seems 

 most like idanus. They differ as follows: /. guianensis: Inner edge 

 of prehensorial blade conspicuously serrulate; ventral pore fields 

 extending to and present on penult pedal segment; posterior coxo- 

 pleural pores larger than anterior pores. /. idanus: Edge of pre- 

 hensorial blade smooth, not serrulate; ventral pore fields absent on 

 last four pedal stemites; coxopleural pores all essentially equal in 

 size. 



Holotype, female, USNM 2523, British West Indies, Barbuda, 

 Danby Cave, April 28, 1958, J. F. G. Clarke, collector, in Berlese 

 siftings. 



Length 18 mm. Pedal segments 59. Body weakly, gradually 

 attenuate anteriorly, the head suddenly enlarged giving the region 

 just behind it a necklike appearance. Antennae, head, prehensors, 

 and prosternum light yellowish brown; tergites, pleurites, stemites, 

 legs with underlying fleshy parts dilute sordid green, the ventral pore 

 fields dark sordid green. 



Antennae (see notes E and G, pp. 192, 193): Length 0.6 mm. Distally 

 clavate and geniculate. Articles 2-6 filiform, longer than wide, 7-9 

 cup-shaped and expanding distally, 10-14 very broad and short, as a 

 group clavate, ventrall}^ somewhat flattened and very densely, mi- 

 nutely setose (in contrast with sparser vestiture of rest of antenna). 

 Ultimate article on each side with a slight pit containing about a 



