1930 ] 
Notes on American N emestrinidae 
297 
both in the upper and lower portion, the frons being nar- 
rowest about midway between vertex and antennae, where 
the eyes are barely separated. Ocellar protuberance flat- 
tened, forming a much lengthened triangle, not distinctly 
separated by a groove from the inner orbits. Anterior 
ocellus about twice as far from the posterior ocelli as these 
are apart. Eyes very densely covered with long, gray pile. 
Antennae small, crowded together between the inner orbits ; 
basal segment much longer than the second ; third segment 
flattened, pear-shaped, a little larger than the second. Arista 
about the length of the combined second and third antennal 
segments. Body slender and narrow. Dorsum of thorax 
about as broad as long, the transverse suture distinctly 
marked on the sides, broadly interrupted in the middle. 
Scutellum semi-oval, cushion-shaped, with distinctly swollen 
posterior margin separated from the remainder of the 
scutellum by a slight groove. Abdomen elongate, oval, end- 
ing in an ovipositor composed of several gradually narrowed 
segments, capable of being telescoped into one another. 
Legs slender, the femora not swollen. Wing long and 
slender, slightly over three times as long as wide, a little 
shorter than the body and much longer than the abdomen ; 
entirely hyaline. Costa distinctly developed along the entire 
hind margin of the wing and reached by the diagonal vein. 
The cross-vein separating the first and second submarginal 
cells reaches the third longitudinal beyond its branching. 
Three submarginal cells; the third briefly truncate at the 
base and closed at the apex, which is connected by a long 
stalk with the costa; the two branches of the third longi- 
tudinal vein fused over more than their apical quarter. 
Anal cell broadly open. 
Length (to apex of tergite 4), 10.5 mm.; length of wing, 
10 mm. ; width of wing, 2.5 mm. 
Male . — Differs little from the female, except in the usual 
sexual peculiarities. Eyes densely pilose, holoptic. In the 
specimen I have seen, the color of integument and pilosity 
and the venation of the wing were the same as in the female. 
The pilosity was, however, much better preserved, the entire 
abdomen being clothed, like the rest of the body, with long, 
whitish-gray hairs. 
