CHAMBERLIN: THE CHILOPODA OF BRAZIL. 167 
Antennae short, composed of sixteen (mostly) or seventeen articles. 
None of the articles glabrous but the first two more sparsely clothed 
with hair than the others, the density increasing from the second to 
the fourth and thereafter essentially uniform. 
Anterior margin of prosternum considerably more elevated ectally 
than mesally; bearing two wide but very short dental plates which 
are weakly convex. 
First dorsal plate with a strictly semicircular cervical sulcus which 
is entirely free from the head and at its middle nearly one third the 
distance from the head to the caudal margin of the plate. Median 
longitudinal sulci distinct, subparallel, crossing the transverse sulcus 
and attaining the front margin. 
Second dorsal plate with the median longitudinal sulci appearing 
as very short lines at caudal border, each line being continuous with a 
suleus extending a little cephalad of directly ectad to the lateral 
margin and with a very short line extending mesocephalad. The 
median longitudinal sulci are complete on the other plates. The 
third plate shows a rather wide and shallow median longitudinal 
furrow. Subsequent plates with a distinct narrow median longi- 
tudinal keel set off by two deep furrows. Plates from fifth caudad 
with a distinct longitudinal furrow on each side with also less distinct 
indications of similar ones on the third and fourth. 
Last dorsal plate bowed considerably caudad, the protruding mesal 
portion truncate. Without a median sulcus or with but weak trace 
of such toward caudal end. 
Ventral plates from the second to the penult with a strongly marked 
median longitudinal furrow which is continuous from the anterior 
margin to a little in front of the caudal border. Lateral sulci extend- 
ing from anterior margin to caudal portion of plate, converging with 
each lateral margin. Not distinctly punctate. 
Last ventral plate considerably wider than long; narrowed caudad; 
posterior corners well rounded; caudal margin widely though but 
moderately convex, slightly crenately notched each side of the middle. 
Spiracles moderate; mostly elliptical, being obliquely or rather more 
dorsoventrally compressed. 
Coxopleural processes long and straight; ending in a single slender 
and acute spine; process with but scattered short hairs. 
Prefemur of anal legs armed ventrally with a series of six large 
spines and, in addition, on mesal surface with about eighteen spinules 
arranged in four longitudinal series. Femur armed ventrally with two 
spinules on proximal half and in a longitudinal line. Other joints 
