520 
PACIFIC SCIENCE, Vol. VII, October, 1953 
j 
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V 
/r ■ 
*> /f[Y> 
= .16 mm. 
Fig. 7. P. tuthilll n. sp. a. Head of male (lateral aspect); b, front tibia of male; c, front tibia of female; d, wing; 
e, ninth tergum of male;/, male genitalia (ventral aspect). 
Oped and extends only the height of the ocelli 
above the level of the vertex. The head is 
entirely polished black and is sparsely brown 
to black pilose. Thorax: Chiefly polished 
black, tinged with red. The propleura and the 
area of the dorsum between the combs are 
rufous tinged with brown. The anterior comb 
contains 12 blunt teeth, the posterior comb 
10 sharp teeth. Legs: The front coxae and the 
bases of all the femora are rufous. The re- 
mainder of the legs are brown to black, tinged 
with red. The spines on the front tibiae are 
much stronger than in the males and 3 spines 
are present in the middle set; 2 spines placed 
one above the other on the outside dorsal 
surface and 1 spine placed on the inner dorsal 
surface (Fig. 7c). The extra spine on the fe- 
males is smaller than the others and it possibly 
may occur, at least as a rudiment, in the males. 
I have been unable to detect it on the spec- 
imens at hand but the smaller spines of the 
males are sometimes difficult to differentiate; 
in small species a tiny spine could easily be 
obscured by the bristles of the legs. Wings: 
Slightly more fumose than in the males. Ab- 
domen: Brown, tinged with red. The abdomen 
is sparsely covered with short black pile. 
LENGTH: Body, 2.2-2.45 mm.; wings, 2.5- 
2.65 mm. 
HOLOTYPE male, allotype female, and twen- 
