CHAMBERLIN: THE CHILOPODA OF BRAZIL. #3 
proximally, paler distad. Legs more pigmented distally than proxi- 
mally; the posterior pairs green or bluish green excepting toward 
base. 
Head shining; punctae weak and more or less scattered. The 
usual two longitudinal furrows of the caudal portion, these being 
shallow. 
Antennae composed of seventeen articles of which only the first 
two are glabrous. 
Prosternal teeth 4-4 of which the outermost on each side is more 
remote and is separated by a deeper interval than the others are from 
each other; innermost tooth on each side smallest, the two inter- 
mediate ones of nearly equal size. 
Dorsal plates from the fourth segment on distinctly bisulcate. 
Only the twenty-first plate truly margined but the others of the 
posterior half of the body especially, with submarginal longitudinal 
furrows or depressions which simulate true margination. Plates, 
wholly smooth and with no indication on any of a median keel. Last 
plate more or less angularly produced, the margin bent in on each side 
of the middle (Plate 3, fig. 2); with no developed sulci or pits, the 
plate somewhat’ longitudinally elevated along the median line and 
faintly depressed or furrowed along the middle of this. 
Ventral plates from second to twentieth with two longitudinal sulci 
extending to caudal third or fourth of length where each at its end is 
more deeply impressed. A short pit-like, median, depression in front 
of the caudal margin and a less pronounced median depression farther 
cephalad. Last ventral plate convex. Strongly narrowed caudad; 
caudal margin mesally excised. With a weak median sulcus and also 
on each side a faint fine sulcus from anterior margin to near middle 
(Plate 3, fig. 1). 
Coxopleurae not produced, being caudally simply rounded; un- 
armed. 
First six pairs of legs with two tarsal spines; the seventh to nine- 
teenth with one; twentieth legs withnone. Anal legs wholly unspined, 
being smooth throughout. 
Length 23 and 32 mm. 
Locality State of Amazonas: Mandos! (Mann and Baker). 
Two specimens were secured. 
This species seems to be related to O. limbatus Meinert, but is very 
easily separated through the differences in the spining of the tarsi as 
indicated in the key. 
