86 On new East-Indian Chilopoda and Diplopoda. © 
CHILOPHUS, gen. nov. 
Differentiated from Platyrrhacus and allied forms in 
character of keels and sculpturing. The keels are all large 
and horizontal, with margins wholly even and smooth, and 
strongly though narrowly margined in front and behind 
as well as laterally. On each keel from the first to the 
nineteenth inclusive there is a thick strongly elevated longi- 
tudinal ridge mesad from and parallel with the lateral margin. 
The pores dorsal, well removed from margin, lying in the 
ectal face of the ridge. The dorsal surface not granular, in 
the type evenly finely shagreened over prozonite and meta- 
zonite; each metazonite with three transverse rows of large 
tubercular areas, the most anterior of which is a little in 
front of the middle. Sternites without processes. Hairs of 
clypeal region not forming pencils or fascicles. Antenne 
slender, not clavate. 
Genotype, C. solus, sp. n. 
Chelophus solus, sp. n. 
Resembling in general form the Sumatran P. laticollis. 
It is a more lightly coloured species, being brown, with the 
keels yellow instead of piceous or black. 
Vertigial sulcus deeply impressed down to level of antennz. 
Head densely finely shagreened, with traces of coarser 
granulation above. Antenne reaching to fifth segment. 
As in P. laticollis, the collum is much wider than the head. 
It is nearly three times wider than long instead of only 
twice, as it is in dadicollis. The anterior margin is mesally 
slightly convex, then on each side a little incurved and 
laterally again slightly convex. Caudal margin arcuate, 
widest near or slightly caudad of middle; finely margined 
anteriorly and laterally, and with a prominent longitudinal 
ridge or elevation mesad of each lateral border. Surface 
densely finely shagreened, but not granular. Along caudal 
border a row of large but in part obscure tubercles. 
Second and third keels bent forward a little ; other keels 
straight. The margining of the caudal border of the keels 
extends entirely across the tergite on most somites, though 
in the median region weaker. Tubercles large, rounded, 
those of most anterior row weaker and more widely 
separated. Keels depressed mesad of the border ridge, and 
there densely finely shagreened. The ridge curves con- 
spicuously mesad about each pore. Pores removed by more 
than the diameter of the ring from the margin. 
