NOVITATES ZOOLOQICAE XXI. 1014. 243 



first anteunal segment, which are very long in the ? of P. coxalis, are scarcely so 

 long as that segment in the ¥ of P. xenurus. The labial palpns consists of five 

 segments, and reaches to three-fourths of the coxa. 



Thorax. — The mesonotum has only a few bristle-like teeth on the inner surface 

 near the apical margin. 



Abdomen. — The first tergite bears some apical spines. 



Legs. — The legs agree best with those of P. coxalis, but the fourth segment is 

 rather longer in the mid- and hindtarsi, and the bristles of the hindtibia and 

 hindtarsns are shorter. 



Modified Segments. — c?. The eighth sternite has three or four bristles, which are 

 much shorter than in P. coxalis. The clasper (text-fig. 4, CI.) is oblong, with the 

 ventral margin and ajjex rounded and the dorsal margin very slightly concave. 

 There are four or five fairly long bristles on the outer surface of the clasper and 

 numerous smaller ones at the edges, as shown in the figure, a long one being 

 placed at the apex. The movable exopodite F is straight on the proximal side and 

 rounded on the opposite side, resembling in a lateral aspect an egg with one side 

 straight. The manubrium (M) of the clasper is very slender. The inner arm of the 

 ninth sternite is much narrower than the outer arm. The latter is proximally very 

 broad and tapers slightly from before the middle to the apex. It bears a row of 

 thin bristles along both the ventral and dorsal margins (text-fig. 4, IX. st.), the 



proximal bristles of the dorsal row being rather thicker than the others. 9. The 



eighth tergite is very thickly studded with bristles on the inner surface at the 

 apex, bearing on the outer surface about a dozen bristles or less (test-fig. 5, VIII. t.). 

 The head of the receptaculum seminis has the shape of a fig, and is shorter than the 

 tail, being quite different from that of P. coxalis. 



A small series from Niuahuanchi, Peru, 13,000 ft., March 1911, ofi' Vizcacha. 



Neotyphloceras gen. no v. 



Although agreeing with the Palaearctic genus lyphloceras Wagn. (1903) in 

 the possession of an eye and a genal comb, the species of Neotyphloceras are not 

 very nearly related to T. poppei Wagn. (1903) z.xi&/aD0siis Jord. and Roths. (1914), 

 the only species as yet known of that genus. 



Neotyphloceras is characterised as follows : 



Eye without pigment. A genal comb of four spines from the genal edge 

 across the gena to the eye, the first spine being almost completely covered by the 

 second ; no spine behind the eye (text-fig. 6). Genal process narrow, about as long 

 as the longest genal spine. Frons with two rows of bristles. Second segment of 

 maxillary palpus as long as fourth. Labial palpus consisting of five segments. 

 No circular internal incrassation in the autennal groove. 



Pronotum with one row of bristles, the spines of the comb as long as the 

 pronotnm. Abdomen without lateral spines, with or without one or two dorsal 

 spines on the proximal segments. Seventh tergite with two antepygidial bristles 

 on each side in both sexes. Pygidium strongly convex posteriorly. 



Fifth tarsal segment with four lateral pairs and one ventral proximal pair of 

 bristles. 



In the cJ the eighth abdominal segment ventrally with few bristles. Clasping 

 organs with two manubria on each side. In the ? one receptaculum seminis, which 

 has a very large head and a short tail (text-fig. 8). 



