East-Indian Chilopoda and Diplopoda. 83 
Anal scutum with sides parallel, caudally semicircularly 
rounded, crenate; dorsal surface granular proximally. 
Valves nearly flat; mesal border elevated but not sharply 
set off. Scale subtrapeziform, the caudal margin slightly 
convex between the tubercles. Sternites each with four low 
processes, one at base of each leg. 
Male gonopods beyond coxa broad, becoming flattened 
distad, narrowing and then uncate, expanding into a thin 
blade, which bifurcates distad into two acute short processes. 
Length (male) about 32 mm.; width 6 mm. 
Locality.—Borneo: Sarawak, Ladong (H. W. Smith). 
Type, Mus. Comp. Zool. (No. 4686). 
Platyrrhacus lamprus, sp. n. 
This resembles in coloration the other two species of the 
group ( Haplarorachia, Poc.) known from Borneo, H. everetti 
and 7. hosci of Pocock, but the yellow of the keels extends 
further mesad and much beyond the pore. The dorsum 
elsewhere is a coffee-brown. Legs flavous or distally light 
brown. 
Head densely granular above ; the region below antenne 
shagreened. Vertigial furrow deep. 
Collum widest in front of middle. Anterior margin 
straight in middle region, curving caudo-ectad at the 
ends. Surface in general densely granular; the tubercles 
behind anterior border small; caudal border elevated and 
bearing a series of exceptionally large subconical tubercles. 
The tubercles of the caudal row on the second plate also 
very large, the corresponding ones of other plates becoming 
smaller. The tubercles of the other two rows much smaller 
and more inconspicuous. Surface densely granular to or a 
little beyond base of keels, the surface of the latter being 
most weakly uneven. Pores much closer to margin than 
in either of the two other species mentioned, even in the 
anterior region being rather less than once and a half the 
diameter (inclusive of rim) from the margin and in the pos- 
terior region, but the diameter from the margin. Lateral 
margin of keels smooth, narrowly raised. Anterior margin 
somewhat raised or thickened, the tubercles projecting so as 
to produce fine serration ; caudal margin as a whole running 
a little caudad of mesad, slightly concave, finely serrate, with 
a larger tooth at ectal angle and a larger rounded prominence 
at mesal end, this neither triangular or tooth-like. 
Caudal scutum somewhat widest distally. Caudal end 
with three prominent processes, a broad triangular median 
G* 
