372 
Head (fig. 2 a). It bears considerable resemblance to the liead 
of P. robustus. The ejes are rather small, not quite twice as long 
as broad; the distance between them is one third longer than the 
length of an eje. — The hairs in the two anterior rows and the 
submedian pair in the fourth row are moderatelj long, in the third 
row comparativelj short, and all these hairs are rather stronglj 
clavate; the intermediate hairs in the fourth row are somewhat cla- 
vate and a little shorter than the ejes, while the sublateral hairs 
are slightlj clavate and about two thirds as long as the inter¬ 
mediate pair. 
Antennæ (fig. 2 a). The upper one of the front hairs on the 
fourth joint of the peduncle is as long as the three distal joints 
together and nearlj twice as long as the other hair. The upper 
branch is as long as the peduncle, about six times longer than 
broad; its flagellum is a little more than twice as long as the 
branch and a little shorter than the breadth of the head. The 
lower branch is about two thirds as long as the upper, two and a 
half times longer than broad, slightlj widening distallj; the an¬ 
terior angle is verj deeplj and obliquelj cut o ff; the posterior fla¬ 
gellum is a little shorter than that on the upper branch and slightlj 
more than twice as long as the anterior flagellum. All three fla- 
gella are siender, the two longest of them slightlj thickened near 
the end. The globulus is moderatelj small, not as broad as the 
upper branch; the stalk is rudimentarj. 
Trunk (fig. 2 b). Moderatelj siender. — The fifth pair of 
tactile setæ is somewhat more tlian twice as long as the breadth 
of the segment, rather robust and delicatelj pubescent. The fourth 
pair slightlj more than two thirds as long as the fifth and some¬ 
what thinner. The third pair is slightlj more than half as long 
as the fifth, slightlj thicker and more pubescent tlian the fourth, 
almost thickened from the base to the middle and tapering distallj. 
— The posterior dorsal setæ on the penultimate segment are rather 
long, cjlindrical; the setæ on the last segment are rather long, 
