70 Mr. R. V. Chamberlin on new 
The median piece with the distal plate large, nearly attaining 
distal ends of the inner prongs of the gonopods, much 
exceeding the proximal arms in length, moderately narrowing 
distad, well rounded at the end; the proximal branches 
small, curving about the bases of the gonopods to each ectal 
side. 
Number of segments fifty-four. 
Length (male) nearly 42 mm.; width 3°25 mm. 
Locality.—Philippines: Los Bajios (C. F. Baker). 
Type, Mus. Comp. Zool. (No. 4787). 
Trigoniulus melanotelus, sp. n. 
This species resembles the widespread 7. lumbricinus 
(Gerst.) in size and coloration, but is easily distinguished 
from that species in the character of the sculpturing of the 
segments. The general colour is brick-red, with the pro- 
zonites darker, producing an annulate appearance. Some- 
times, however, the reddish colour may be almost lacking. 
The head, collum, and anal segment darker, blackish, the 
collum margined with reddish, the anal scutum paler along 
the free margin, and the head lighter laterally. Legs fulvous 
of a reddish cast. 
The antenne short. Eyes snbtriangular, the caudal side 
convex, the others straight. Labial pores as usual. 
Collum narrowed as usual, the lower end well rounded, 
not at all acute, the anterior and caudal margins above and 
below somewhat concave. Marginations as usual. 
Segmental sulci five, but distinct throughout, curved 
Opposite pore. Segments not at all or only vaguely con- 
stricted. A salient characteristic in the sculpturing by 
which the species may at once be recognized is that each 
segment is densely, finely, longitudinally striate below the 
pore over both rings, as also for a way above it-and across 
the dorsum as well as over the metazonite ; the dorsal region 
of the prozonite free from longitudinal striew, but densely 
marked with short curved impressed lines, much as in Jum- 
bricinus. The longitudinal strie give a somewhat silky 
lustre, much as in certain species of Dinematocricus (seri- 
cordes aud allies). 
Anal scutum rounded behind, covering the valves; surface 
not striate, marked with impressed, branching, coriarious 
lines. Valves margined. 
In this species the distal division of the median plate of 
the male gonopods is large and triangular, extending much 
distad of the end of the coxa, excepting that the mesal side 
