1930] Notes on American N emestrinidae 293 
Professor Cockerell informs me that two females and one 
male have been taken at Boulder, Colorado. 
After examining a large number of Neorhynchocephalus, 
I am unable to regard any of the characters given for sub- 
nitens as of specific or even varietal value. Cockerell de- 
scribed subniiens as follows: “Smaller than R. sackeni 
Will.; length of wing just over 8 mm. (over 9% in 
sackeni) ; pubescence paler, with a sort of greenish gray 
tint ; abdomen less hairy, the bases of segments 2-4 broadly 
exposed, shining black ; ovipositor shorter, with a stronger, 
more even curvature; eyes apparently lighter and redder; 
ultimate branches of cubitus (bounding second posterior 
cell of Williston) uniting a very short distance before mar- 
gin of wing (a considerable distance in sackeni).” The 
difference in the venation especially is unimportant, consid- 
ering the variability exhibited by most species of Nemes- 
trinidae. In the series of N. sackeni which I have studied, 
hardly two specimens are alike in this respect and often the 
right wing differs considerably from the left. For instance, 
the third submarginal cell may be petiolate at the base or 
broadly or narrowly connected with the first submarginal. 
In one female, from Salt Lake City, the left wing is fairly 
normal, but in the right wing the third submarginal cell is 
subdivided at about its basal quarter by a supplementary 
cross-vein. A somewhat similar abnormal division of 
the third submarginal cell in one wing is present in a 
female from Grangeville, Idaho, in a female from Forest 
Grove, Oregon, and in a male from Colorado ; but the cross- 
vein is placed at a varying distance from the tip of the cell. 
A male from Colorado, in V. v. Roder’s collection (Zoologi- 
cal Institute of the University at Halle a. S.), is even more 
aberrant: while the right wing is normal, in the left wing 
both the second and third submarginal cells are subdivided 
by cross-veins, placed a short distance from each other near 
the middle of the cells ; in addition this left wing has a sup- 
plementary cross-vein about the middle of the fifth posterior 
cell, uniting the lower border of the fourth posterior cell 
with the hind margin. Cockerell also has figured the closed 
third submarginal cell of the right wing of a male from Col- 
orado. The length of the apical stalk connecting the closed 
second posterior cell with the margin is very variable and 
