404 
Remarks. This species is easily distinguished from P. oculatus 
by a number of characters: all the hairs are thicker and sharply 
ringed, bottø front hairs on the fourth antennal joint short, the hair 
on the lower antennal hranch thick and ringed, the anal plate of 
► 
another shape, etc. 
21. P aur opus claviger n. sp. 
PI. VI, fig. 2a-2e. 
Material. One .extended and well-preserved adult male. 
Head (fig. 2 a). The eyes are broad but short, about one 
half longer than broad, and a little shorter than the distance be- 
tween them. — The hairs are short, partially very short; a com- 
parison between the hairs in the foiir rows with the corresponding 
hairs in other species gives the; result that they are somewhat to 
much shorter than in any other form of the genus; the six hairs 
in the fourth row are al most equal in length and not longer than 
those in the third row. 
Antennæ (fig. 2 a). The upper one of the front hairs on the 
fourth joint is slightly longer than the joint and twice as long as 
the other. The branches and flagella almost as in the preceding 
species; the upper branch is even slightly shorter than the fourth 
joint, slightly more than one half longer than broad; its flagellum 
is six times longer than the branch and somewhat shorter than the 
breadth of the head. The lower branch is conspicuousjy longer than 
the upper, a little more than one half longer than broad, with the 
anterior angle very deeply and very obliquely cut o ff the hair on 
its lower side is rather long, ringed, eylindrical and considerably 
thinner than in P. simulans. The posterior flagellum is somewhat 
shorter than that of the upper branch and more than twice as long 
as the anterior. All three flagella are robust and considerably 
thickened towards the end. The globulus is slightly oblong, large, 
but scarcely as broad as the upper branch ; the stalk is short. 
Trunk. Very siender. — The fifth pair of tactile setæ is 
short, scarcely one fourth longer than the breadth of the segment, 
