1933] New Genus of Phoridx from Peru 111 
at the broad area of contact; third vein sharply approach- 
ing 1 the costa then running nearly parallel with it; fourth 
vein curved at base, then running straight and ending 
slightly before the wing-tip; fifth, sixth and seventh veins 
nearly straight. Chitinous thickening of wing membrane 
broadly oval, convex and smooth above, convex below with 
several longitudinal corrugations basally; lying very close 
to the third and fifth veins near the basal fourth of the 
wing; beyond the button-like thickening is a subquadrate 
spot of about the same area of brown color, but not very 
evidently chitinized. 
Type, one female from Iquitos, Peru; March-April, 1931 
(R. C. Shannon). Type in the U. S. National Museum. 
Explanation of Plate 5. 
1. Phymatopterella shannoni sp. nov. Lateral view. 
2. Phymatopterella shannoni sp. nov. Upper basal part of 
wing, seen from above. 
3. Enicospilus purgatus Say. Discocubital cell, showing 
chitinous thickenings of the wing membrane. 
4. Chauliodes pectinicornis Linn. Nygma, in cell R 5 of 
front wing. 
5. Arge ccerulea Morton. Nygma in second submarginal 
cell. 
