155 
less, as are the oblique or discoidal veins; the rib-vein blackish some¬ 
what enlarged along the inner margin of the stigma; marginal vein 
blackish. Length to the tip of the abdomen, 0.05 inch; to the tips of 
the wings 0.08 inch. 
Sub-fam. CIIERMESIN^E. 
As I have not had an opportunity of examining sufficient material 
either of this or the following sub-family, I shall make no attempt to 
define them strictly, nor to do more than give the brief descriptions I 
find in the works of other authors, and add the descriptions of some 
two or three specimens I have discovered. 
As indicated in the synoptical table of the sub-families, this group 
may be distinguished by the following character sties: 
The front wings, with but two discoidal veins, both simple, the 
third vein wanting. The fourth or stigmatic 
vein is usually long, and appears as a third 
discoidal vein. (Fig, 29.) But the venation is 
not regular. The hind wings sometimes have 
a single branch vein, but in many species this 
is abreviated, or entirely absent. Antennm 
never more than five-jointed, in Phylloxera 
they are only three-jointed; short. So far as 
the species have been studied, they have been 
found to be oviparous. 
fig. zy. 
Wings of Chernies laricis. 
Genus CHERMES. Linn. 
Antennm very short, reaching but little beyond the neck when 
turned back; composed of five joints, the two basal joints short, the 
remaining ones generally sub-equal in length, the fifth oval. Front 
wings rather large, transparent, the two discoidal and stigmatic veins 
7 
