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 (which are inserted a. little 
åbove or below the hind margin) are setiform, slender, 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 each 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 thé' segment and 'a little 
more distant from each other than those of the posterior pair, they 
are short, about as long as the outer branches of the anal plate. 
— The anal plate (fig. 6a and 6 b) is very interesting; its: dis- 
coid portion widens posteriorly and is about as long as broad; 
from the posterior angles originaté two slender, 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 vare rather short. The last pair (fig. 1.6) -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 than the tibia, The hairs on 
coxa and trochanter are biramous with thin, ringed branches; the 
