367 
pair is almost more than two and a half times longer than the 
bieadth of the segment, robust and pubescent witli moderately long 
haiis. The penultimate pair is two thirds as long as the last pair, 
robust, tapering and pubescent almost as the last one._The 
dorsal setæ on the two posterior segments are short, thick, acute 
and almost spine-like; the setæ on the last segment only about as 
long as one sixth of the posterior breadth of the segment. The 
two posterior segments are rather conspicuously pubescent. 
Anal Segment (fig. 5 b and 5 c). The tergum is posteriorly 
rounded; its three pairs of setæ are thin, slightly longer than the 
setæ on the last segment of the trunk and subequal in length, the 
intermediate pair being perhaps a little shorter than the twoothers; 
the distance between the setæ of the submedian pair is slightly 
shorter than their length, but decidedly longer than the distance be¬ 
tween the submedian and the intermediate pairs. (The supplemen- 
tary pair of short proximal setæ always existing in specimens witli 
eight pairs of legs is not seen in fig. 5 b, the proximal part of the 
abdomen bearing these setæ being retracted beneath the tergum of 
the pieceding segment.) The styii are about three times shorter 
than the submedian dorsal setæ, thin and cylindrical. — The ster- 
num with its posterior margin deeply and rather broadly emarginate, 
and in the median line projects backwards and slightly downwards 
a rather large process, which is subconical with the end rounded; 
the posterior setæ are half as long as the breadth of the segment; 
the anteiioi pair is rather robust and about one third as long as 
the postei ioi pair, the distance between its setæ is somewhat longer 
than between the submedian dorsal pair, and they are inserted nearer 
to the hind margin than to the base of the segment; the lateral 
paii is about as long as the lateral dorsal setæ. — The anal plate 
(fig. 5 c) is, without taking the branches into consideration, some¬ 
what bioadei than long; from the hind margin project four branches 
which are rather siender, tapering, subparallel and arranged in the 
same plane; the inner branches are somewhat longer than the plate 
w hich is about as long as the outer branches; the outer branches 
