428 Mr. R. I. Pocock on new 
Genus Puyopesmus, Cook. 
Phyodesmus, Cook, Brandtia, i. p. 1 (1896). 
Phyodesmus ornatus, sp.n. (Fig. 1, p. 481.) 
g .—Colour (in alcohol) of dorsal surface bluish grey, the 
middle of the back yellowish green; the cylindrical part of 
the segments with a broad blackish blotch on each side, 
separated by a triangular paler portion; keel-bearing portion 
of segments furnished with two or three black spots on each 
side in front and a few more behind; at the end of the body 
these spots show a tendency to fuse and form continuous dark 
bands ; pores black; antennee and legs blackish. 
Length of antenne excelling width of first tergite by about 
half its own width, less than width of second. 
First tergite with its angles produced, the anterior border 
straight between them. Second segment about as wide as 
the twelfth. The anterior seven segments with merely lobulate 
side margins, the rest with two or three distinct though short 
triangular teeth; anterior border of keels convex, with 
rounded basal shoulders, posterior border lightly sinuous, both 
smooth. fore on fifth and seventh segments about three 
diameters from the edge, on the toothed keels not more than 
two diameters from the notch. Caudal process posteriorly 
narrowed, posterior border straight but laterally notched. 
Copulatory foot (as in fig. 1) straight, ending in a shorter 
blade-like ramus and a longer curved prong, from which 
projects a smaller lamina. 
Measurements in millimetres.—Total length 100; width of 
second segment 14:5, of fifth 16, of twelfth 14:8. 
Loc. Borneo (Rev. G. Brown). 
Phyodesmus Hosei, sp.n. (Fig. 2.) 
d .—Resembling the preceding, but bluer in colour, without 
yellowish-green dorsum, and the black patches on the 
cylindrical part of the segments separated by a narrower pale 
band. 
Keels also considerably larger, with the teeth much stronger, 
appearing as far forwards as the fifth segment; on the 
posterior segments long and sharp, the pore being often quite 
close to the adjacent notch. 
Copulatory foot much longer, the long prong broader at 
the base, the short ensiform process much shorter and not 
projecting as straight forwards. 
Measurements in millimetres.—Total length (at least) 96 ; 
width of second segment 15, of fifth 17°7, of twelfth 16. 
Loc. Baram, Borneo (C. Hose). 
a 
