375 
thickened distally. The globulus about as broad as tke upper 
branch, and its stalk is short. 
Trunk (fig. 3 b). Moderately siender. — The fiftk pair of 
tactile setæ is scarcely twice as long as the breadth of the seg¬ 
ment; tlie fourth pair is about two thirds of the fifth and the third 
pair four fifths of the fourth; in other respects all three pairs agree 
with those in P. argentinensis. — The dorsal setæ on the penul- 
timate segment as in the last-named species; the setæ on the last 
segment are long, and those of the posterior submedian pair, which 
are the longest of all, are half as long as the breadth of the 
segment. 
Anal Segment (fig. 3 c). The tergum is very broadly rounded 
behind; its setæ in all respects as in the preceding species, with 
the exception, that those of the submedian and intermediate pairs 
are a little longer. — The styli are shaped as strongly clavate 
hairs, about four times longer than thick and much longer thao the 
branches of the anal plate. — The sternum with the posterior setæ 
slightly clavate and as long as the submedian dorsal setæ; the 
lateral setæ are scarcely half as long as the posterior ones; the an- 
terior setæ are short, thin, inserted rather near the base of the 
sternum and considerably longer from each other than those of the 
posterior pair. — The anal plate is rather similar to that in P. 
argentinensis , but more flatly rounded behind, and its two branches 
are more distant from each other, besides thicker and shorter than 
in that species. 
Legs. Almost as in the preceding species. The last pair 
(fig. 3 d) with the femur slightly shorter, the tibia a little longer 
than in that species; the seta on the tibia is almost as long as 
the joint. 
Copulatory Organs (fig. 3 e). They are proportionately a 
little shorter and thicker than in the preceding species. Seen from 
the side the posterior margin is almost concave at the middie, di¬ 
stally a little convex, the anterior margin is straight near the base, 
while the rest is considerably convex; the apex is blunt. 
