322 
Psyche 
[December 
pronotum, is much more like that of Perientomum than of 
any of the true Psocidae. The presence of scales is also a 
character of some value. Moreover the genus Psyllipsocus 
has the anal and axillary ending together, and this surely is 
not allied to the true Psocidse. 
Perhaps it would be better to consider the scaly-winged 
species to belong to two families rather than two sub- 
families, but I think that the differences between them are 
not as important as between them and the true Psocidse. 
Indeed I think that they form a tendency to run into the 
Psyllipsocidse. Embidopsocus I have united with Archip- 
socus in one family, although it might be better to put each 
in a family ; both are primitive as to the pronotum and some 
other characters, but have a reduced rather than primitive 
venation. It is among the scaly-winged species that we 
find the more primitive forms. On the one side there has 
been a reduction of pronotum and specialization in venation 
to the true Psocids, and on the other side a reduction in 
wing-characters toward the Atropidse. 
The old family Psocidse I would consder as a super- 
family, Psocoidea with the following families, subfamilies 
and tribes as in the table. 
Zorotypus I would also include in the order Corrodentia 
as the superfamily Zorotypoidea. 
I would place Hemipsocus in the Cseciliinse ; the venation 
(outside of the cross-vein) is more that of Csecilius than of 
Psocus. 
Certain Epipsocus show that the separation between the 
Cxciliinse and Psocinse is not of great moment, and perhaps 
it would be better to reduce these groups to tribes. 
Vulturops Towns, will go in the family Psoquillidse . 
Heteropsocus is the same as Psoquilla, but the species is 
distinct. Psocinella and Psocathropos differ in length of 
hind femora. Notiopsocus and Allopsocus go in the Peri- 
psocini. Rhyopsocus goes in the Psylloneurinse. 
1. No wings, or only scale-like wings without definite 
venation; no ocelli; tarsi three-jointed, antennae 15 
or more jointed; pronotum visible above Atropidse 
Wings with definite venation present 2 
