405 
very thin, with the pubescence exceedingly delicate and rather short. 
The fourth pair is a little shorter than the fifth, exceedingly thin, 
with the pubescence more visible. The tliird pair (fig. 2 b) is al¬ 
most three fourths as long as the fifth, each seta terminates in 
a large, oblong bulb, which is a little more than twice as long as 
thick, about one fifth of the whole length of the setæ, naked and 
hollow; the seta increases gradually somewhat in thickness from the 
base to the bulb, it is naked at the base, and outwards it is clo- 
thed with gradually more conspicuous, short, vertical pubescence. _ 
The dorsal setæ on the last segment are very short. 
Anal Segment (fig. 2 c). Very similar to that in P. simulans. 
The tergum with the submedian setæ inserted rather near the mar¬ 
gin, short, cylindrical and considerably shorter than the distance 
between them; the intermediate setæ are still shorter and inserted 
rather near the lateral setæ which are a little longer than the sub¬ 
median pair. — The styli are shaped as clavate hairs and scarcely 
as long as the submedian setæ. — The sternum with the posterior 
setæ between four and five times longer than the submedian pair, 
while the lateral pair is about as long as these. — The anal plate 
is considerably broader than long, the lateral margins are convex, 
posteriorly the plate has a very broad, moderately adeep incision 
which is strongly narrowing: the result is that the pite terminates, 
in two lateral, short, broad, triangular branches with acute end. 
„ Legs. They are very short and increase scarcely in length 
posteriorly. The last pair (fig. 2 d) is shorter than in any other 
species and very robust; the femur is about as long as the tro- 
chanter, as long as thick and slightly shorter than the tibia, which 
is one third longer than thick; the tarsus is unusually thick and 
one third longer than the tibia. The hairs on coxa and trochanter 
are simple and clavate; the seta on the tibia is only one fourth 
as long as the joint. 
Copulatory Organs (fig. 2 e). Seen from the side they aré 
only a little longer than thick, slightly conical in two thirds of the 
