CHAMBERLIN: THE CHILOPODA OF BRAZIL. 207 
Dorsal plates with a pair of longitudinal deeply impressed sulci on 
the middle portion and an additional longitudinal sulcus farther 
laterad on each side less sharply impressed; indications on some 
segments also of a shallow median longitudinal median furrow. First 
dorsal plate considerably wider than the second and at its ends bent 
ventrad toward the base of each leg and crenately incised on the 
caudal side near each corner (Plate 5, fig. 4). 
Spiracles large; all elliptic, the anterior ones being oblique but more 
nearly horizontal than vertical, becoming strictly longitudinal caudad; 
first spiracle not larger than the second; those of the caudal region 
smaller as usual. Suprascutella large and distinct in the posterior 
region but absent in the anterior. 
Ventral pores in two broad transverse bands connected at the ends 
and thus forming a quadrangle. Enclosed area mostly with a distinct 
transverse furrow or row of impressed spots or the whole area rough- 
ened with irregular impressions, in most more deeply impressed 
longitudinally at middle. 
Last ventral plate pentagonal, the sides strongly converging 
caudad and the caudal margin straight. Marked with a longitudinal 
median furrow which is not especially deep. 
Coxopleurae rather large, coxiform; longer than thick in the direc- 
tion of thinnest diameter; the trochanter only about one third as long. 
Anal legs in male considerably shorter than the penult; composed 
of six articles ! which decrease in diameter regularly from base distad. 
Pairs of legs 77. 
Length 88 mm.; length of antennae, 2.2 mm.; greatest width of 
body, 3.3 mm.; width of first dorsal plate 1.9 mm. 
Locality — State of Rio Grande do Norte: Natal! (Mann). 
While this species is close in many features to brevilabiatus, it is very 
easily separated from this wide-spread form. It is most readily dis- 
tinguished by the antennae which are much shorter, extending only to 
the caudal end of the basal plate or thereabouts, whereas in brevilabia- 
tus they reach upon or toward the caudal end of the second pediferous 
segment; also the antennae are conspicuously wider at the base and 
more strongly attenuated (Plate 5, fig. 4). The dorsal plate of the 
first segment is clearly different, being bent farther ventrad of ends 
and being more considerably notched on caudal side toward each 
caudolateral corner. It lacks the conspicuous geminate dorsal black 
stripe so characteristic of brevilabiatus. 
‘The right leg of the type specimen appears to have been regenerated. It is 
shorter than the other and consists of but five articles. 
