374 
twice as long as thick, conical, with the end rather broadly obtuse, 
but the cone is curved so that the iuner margin is slightly concave 
and the outer rather convex. 
Length. The longest female measures *96 mm., the longest 
male *9 mm., but both specimens are somewhat contracted. 
Locality. Pampa Piray (Alto Par anå, Argentina), 
July 21. 1900 (Dr. F. Silvestri leg.). 
Remarks . This form has a certain resemblance to species 
belonging to the group of P. Huxleyi. But the length of the 
dorsal setæ on the anal segment, the development of the anterior 
ventral setæ on the same segment, the shape of the styli and espe- 
cially the shape of the anal plate separates it widely from all spe¬ 
cies described above. It is closely allied to the next species; the 
essential differences are pointed out in „remarks “ on p. 376. 
8. Pauropus inornatus n. sp. 
PI. III, fig. 3 a—3 e. 
Material. An adult male and a specimen with eight pairs of 
legs, both well preserved; besides fragments of a third specimen. 
Head. The distance between the eyes in the male a little 
shorter and in the immature specimen a little longer than the length 
of an eye. — The hairs as to shape and length exactly as in P. 
argentinensis. 
Antennæ (fig. 3 a). The hairs on the fourth joint as in the 
preceding species. The upper branch is scarcely as long as the 
three distal joints together and scarcely five and a half times longer 
than broad; the flagellum is about two and a third times as long 
as the branch. The lower branch is a little less than three times 
longer than broad and shaped almost as in P. argentinensis , but 
the anterior angle is less broadly cut off; the posterior flagellum is 
about four fifths of that on the upper branch. and the anterior 
flagellum is only a little shorter than the posterier one. All three 
flagella are less siender tlian in P. argentinensis and conspicuously 
