CHAMBERLIN: THE CHILOPODA OF BRAZIL. 197 
ends of articles as usual, these also being longer than the more proxi- 
mal ones. 
Cephalic plate widest in front of middle where it bulges convexly on 
each side; sides of head caudad of this straight and a little converg- 
ing to level of posterior end of first joint of prehensors (femur), then 
abruptly more strongly converging to the caudal corners which are 
not rounded; caudal margin straight; anteriorly the head is convexly 
widely rounded. Longer than wide, the ratio being nearly 43:38. 
Antennae short being only 1.9— times longer than the cephalic plate; 
scarcely attenuated. Hairs very short, denser on the more distal 
articles, with hairs longer and more sparse on the proximal ones. 
Articles short, decreasing distad, with the sides more nearly straight 
than in perditus; ultimate article not much differing in length from the 
two preceding taken together. 
Prebasal plate exposed. 
Basal plate conspicuously narrowed cephalad; trapeziform. ‘Two 
and a third times wider than long. Slightly more than one third as 
long as the cephalic plate (ratio 1: 2.8-2.9). 
Claws of prehensorial feet when closed attaining the front margin 
of the cephalic plate. Joints all unarmed within as usual. Sides of 
prosternum for most of length nearly straight and but slightly converg- 
‘ing caudad, more abruptly rounding into caudal corners. Much wider 
than long, the ratio being 47:34. Longer than the first joint of pre- 
hensors in ratio 3:2. 
Dorsal plates mostly showing a fine median sulcus in addition to the 
lateral ones. Anterior prescuta short, those of the middle and pos- 
terior regions becoming rather long, the last few then again short. 
Spiracles all circular; the first considerably larger than the second, 
the others decreasing caudad and those of the posterior region very 
small or minute. 
First fourteen or fifteen sternites angularly produced at middle of 
caudal margin, the process small; process fitting into an excavation 
in the succeeding segment as usual. The antérior margin of the 
second sternite conspicuously extended from sides to middle, that of 
the third segment similarly but less strongly produced, that of the 
fourth merely convexly bowed out, and those of the succeeding ones 
straight, or nearly so, or even a little incurved. Ventral pores present 
on all sternites excepting the first and the last; pore area subcircular, 
with the pores numerous. Sternites mostly showing a longitudinal 
median furrow which is deepest just in front of the middle, and a 
weaker transverse furrow which curves across in front of the pore area. 
