370 
tergum overreaches the sternum and is produced backwards into a 
median, rather long, triangular process; its three pairs of setæ are 
exceedingly long, strong and tapering; the submedian pair as long 
as or even longer than the breadth of the segment, a little longer 
than the intermediate and somewhat longer than the lateral setæ; 
the submedian setæ are inserted on rather large protuberances, the 
intermediate setæ on smaller knots. (In the immature specimen 
a moderately short and thin submarginal seta is found near the 
base of the tergum.) — The styli (whicli are inserted a little 
above or below the hind margin) are setiform, siender, tapering 
and about as long as the anal plate with its branches. — The 
sternum with the hind margin emarginate; the posterior setæ are 
very distant from eacli other and somewhat or considerably shorter 
than the lateral pair of dorsal setæ, but they are a little or con¬ 
siderably longer than the lateral ventral pair; the anterior setæ 
are inserted rather near the base of the segment and a little 
more distant from each other tlian those of the posterior pair, they 
are short, about as long as the outer branches of the anal plate. 
— The anal plate (fig. 6 a and 6 b) is very interesting; its dis- 
coid portion widens posteriorly and is about as long as broad; 
from the posterior angles originate two siender, diverging branches 
which are somewhat longer than the plate itself; above these bran¬ 
ches and slightly nearer the middle line originate two other 
branches which are a little shorter, thinner and less diverging than 
the outer ones, and besides lying somewhat above them; dorsally 
the plate has a rounded lobe projecting between the basal part of 
the upper branches, and these are somewhat curved in the vertical 
plane. 
Legs. They are rather short. The last pair (fig. 1 c) is 
moderately robust; the femur is slightly longer than the trochanter, 
slightly longer than thick and a little longer than the tibia; the 
tarsus is about two thirds longer tlian the tibia. The hairs on 
coxa and trochanter are biramous with thin, ringed branches; the 
