106 SPOLIA ZEYLANICA. 
first and upper branch of the median vein. The median vein sub- 
divides into five branches, the three basal, lower ones arising at 
nearly equal distances apart, and of nearly the same length ; the 
first and upper one arising on the outer fourth of the wing ; a slightly 
marked sub-median vein. The wings are folded at a low angle over 
the back. 
‘* Length of body, -10; of body with the wings folded, -14 inch, 
‘* T first observed this insect under the loose bark of a stump, 
moving in groups of several, running swiftly when disturbed, like 
other Psoci, to a place of concealment, at Brunswick, Maine, early 
inJuly. I also found a specimen September Ist in Salem, Mass. 
‘* Dr. Hagen, the founder of this genus, kindly drew my attention 
to the great interest attaching to the discovery of this insect in this 
country, indicating the genus, and that the species was undescribed.” 
Frank Aaron. l.c. :— 
‘“* Antenne much shorter than the wings, pale fuscous ; palpi 
fuscous. Nasus = clypeus fuscous, pilose ; rest of head somewhat 
pilose, pale, with dark brown markings, a bent brown line across the 
head transversely, separating the anterior from the posterior ocelli ; 
before the ocelli, in the middle, some irregular brown markings and 
bands (varying in different specimens), and between the ocelli, 
connecting with the transverse line, two convergent brown lines, 
extending to a brown patch on each side upon the occiput ; on each 
side, within the margin of the eyes, another brown spot, becoming a 
line, and also joining the occipital patches. Ocelli black, each one 
within a small brown spot ; eyes brown and golden yellow. Thorax 
brown, portions pale luteous, dorsum of mesothorax dark brown, 
somewhat scaled, and very pilose. Abdomen pale yellowish or 
luteous (in some specimens fuscous, probably discoloured by drying), 
with some brown markings. Legs fuscous, somewhat paler or 
luteous ; tarsi luteous, fuscous towards base. 
‘« Wings fuscescent or smoky when denuded, becoming hyaline 
towards the apex ; veins darker, semi-transparent. Scales mostly 
fuscesent, paler towards the base ; when upon the wing seemingly 
fuscous, and when thickly placed appearing almost black ; other 
scales luteous upon the wing. These scales cause the wing to be 
covered with black, fuscous, and luteous patches. The long apical 
hair mostly fuscous, luteous in patches. 
‘« Hind wings hyaline, slightly infuscated, no scales, the long apical 
hair fuscous. Length to end of wing about 3 millim. 
‘‘ Pennsylvania. I found this species on the trunks of beech trees 
in a wood near Philadelphia. It is very active, quick and difficult to 
secure. I believe it represents a group entirely new to our fauna.” 
