364 
the length of the two outer pairs of hairs in the fourth row: the 
intermediate setæ are exceedingly long, much longer than the eyes, 
almost as long as the distance between them and twice as long as 
the sublateral setæ. 
Antennæ. (fig. 4a). The two front hairs on the fourth joint 
are slightly longer than in P. intermedius. The upper branch is 
about eight times longer than broad and a little longer than the 
peduncle; its flagellum a little more than twice as long as the 
branch. The lower branch is longer than that in the three prece- 
ding species and about four times longer than broad, its anterior 
distal angle is considerably more obliquely and deeply cut off than 
the posterior; the posterior flagellum is one fifth longer than the 
anterior; all three flagella are very slender. The globulus is small, 
its transverse diameter conspicuously shorter than that of the upper 
branch; the stalk is rather short. 
Trunk. Robust. — The three posterior pairs of tactile setæ 
and especially the third and the fourth pairs are proximally thicker 
than in P. Hualeyi; the fifth pair is nearly three times longer 
than the breadth of its segment; the fourth pair is more than three 
fifths and the third pair scarcely half as long as the fifth pair; 
all are tapering and shortly pubescent almost to the base. — The 
dorsal setæ on the penultimate and the last segments (fig. 4 b) are 
slightly tapering, very thick and exceedingly long, longer and thicker 
than in the three. preceding species. 
Anal Segment (fig. 4). The tergum is produced backwards 
into a rather small triangular projection; its three pairs of setæ 
are very thick, acute, proportionately short, the two outer pairs 
being a little more than one fourth of the longest setæ on the 
last segment of the trunk, and the submedian pair a little shorter 
than the søblateral setæ. — The styli are about as thick as in 
P. intermedius and somewhat longer than in that species. — The, 
sternum has its posterior setæ somewhat 'shorter than the dorsal 
setæ on the last segment of the trunk. — The anal plate (fig. 4) 
with the proximal portion of the inner branches shaped like a very 
