NEWPORTIA.—GEOPHILUS. 30 
This species is closely related to the preceding, but differs in the structure of its 
anal legs. Thus the proximal segment of the tarso-metatarsus is only about half the 
length of the tibia, while all its segments taken together are a little shorter than the 
femur, patella, and tibia of this appendage; the patella, moreover, is armed with 
only one spine beneath. In WV. spinipes, on the other hand, the proximal segment of 
the tarso-metatarsus of the anal legs is almost as long as the tibia, and all its segments 
taken tcgether are considerably longer than the femur, patella, and tibia; moreover, 
the patella is armed beneath with three strong spines. 
Another species has been added to the genus Newportia whilst this paper was in the 
printer’s hands, This is WV. balzani, from Rio Apa, Paraguay, described by Sign. F. 
Silvestri in the Annali del Museo Civico di Genova, xxxiv. p. 767 (1895). From the 
description it is not easy to separate this species from NV. pusilla, Poc., except in so far 
as it appears that the latter has the anal tarso-metatarsus composed of ten segments, 
while in WV. balzani there are twelve subdivisions, 
Order GEOPHILOMORPHA, nov. 
[= Geophilide of authors. | 
There cannot be much doubt that this order will prove to be divisible into several 
families. 
GEOPHILUS. 
Geophilus, Leach, Trans, Linn. Soc. xi. p. 884 (1845). 
The Central-American species of Geophilus may be recognized by the following 
key * :— 
a. Anal sternite wide, wider than long; anal pleure without pores; head 
wider, with convex sides, maxille weaker, sides of the coxal plate largely 
overlapped by the pleura, the line of their union lying obliquely inwards 
and backwards . ...... CR ee oe oe ees, 2 SS. 
6. Anal sternite narrow, parallel-sided; anal pleure porous; head long, 
parallel-sided, coxal plate of maxillipedes wider, the line of junction 
* There is little doubt that the characters mentioned under headings a and 6 of the above table are worthy 
of generic rank, and in that case G. aztecus is the only species of the five that will fall into the genus Geophilus, 
of which G. carpophagus, Leach, is the type. The rest of the species will, I suspect, work out to be referable 
to Mecistocephalus, Newp.; but in any case they already have the two names Pachymerium, C. Koch, and 
Polycricus, Sauss. & Humb. 
F2 
