150 
Psyche 
[Sept. 
larvae or number of palpal and antennal segments. Only 
one species of Dilaridae is now recorded from the eastern 
United States. Most but not all Neuroptera have 3 larval 
instars. 
Pupa. — The pupa illustrated (fig. 16) is near maturity, 
as evidenced by well-developed genitalia and wing vena- 
tion, and dark color of the well-sclerotized portions of 
thorax and abdomen and on the apical two-thirds of tibia. 
The wings are practically black, except at the bases, and 
the N allachius- type venation may be traced. Except as 
indicated by stippling on figure 16, the pupa is pale. 
Each antenna is a simple appendage, but the pectinations 
of the adult are visible within, wound about the central 
axis in spiral fashion. Body length is 3.26 mm. 
The other pupa studied is not so near maturity as the 
one illustrated, and, though it is clearly a male, the dark 
areas are scarcely developed and the wing venation can- 
not be readily traced. 
Cocoon. — The cocoon (fig. 3) is a tightly woven white 
sack without a visible exterior sculpture of any kind. 
The outer surface is covered loosely, and without regard 
to pattern, with clay -yellow particles, which appear to be 
fragments of wood. Others appear to be the excretory 
pellets of wood-feeding insects and are darker. Frass 
and various other particles frequently occur in the gal- 
leries of wood-boring insects, which explains their pres- 
ence on the cocoon of N allachius. 
Material of N allachius americanus examined 3 (previ- 
ously unreported) : 
Adults. — Pittsburgh, Pa., all collected by Hugo Kahl: 
Fern Hollow, July 15, 1911, near orchard (1<?); Fern 
Hollow, August 6, 1907, on tree trunk near hilltop (12); 
Southern Avenue Park, July 8, 1911, in coitu (J 1 , 2) ; op- 
posite Homewood Cemetery, on an oak trunk, July 9, 1910 
(12); Brookline, on tree trunk, July 17, 1910 (12). 
Ingram, Pa., June 28, 1931, W. D. Mcllroy, Jr. (2c?). 
Odenton, Md., August 14, 1918, on Robinia pseudacacia , 
W. L. McAtee (!<?). 
3 All the Pennsylvania specimens except the two from Pern Hollow, J uly 
15, and from Brookline, are deposited in the Carnegie Museum, Pittsburgh, 
Pa., all other material of both N allachius and Lomamvia in the United States 
National Museum. 
