ends of tlie twigs, resembling, in size and form, the cones of the same 
tree.” 
^ Fig. 30. 
Adelges of the Spruce. 
The specific name is applied provisionally and only for use in this 
report. This is certainly distinct from the European species Ok. abietis 
Linn., which is much smaller, of a bright reddish-brown color, with 
the wings tinged with green. 
Genus, PHYLLOXERA. Fonscol. 
This genus which has recently been brought into such prominence, 
on account of the injury done to the grape-vines by. one of its species 
may be characterized as follows: Antennae three-jointed, the third or 
terminal joint being much the longest; length usually about one-fourth 
or one-third the length of the body. Wings large in proportion to 
the size of the body; overlapping and lying flat upon the abdomen in 
repose; anterior pair with three oblique veins in the typical form, 
though the venation is more variable .than in the pieceding genus. 
The first and second veins are often united so that the second ap¬ 
pears to be but a fork or branch of the first; the third, which in real¬ 
ity represents the stigmatic, is always simple when present, but it is 
sometimes abbreviated, and sometimes wanting. Posterior wings with 
an angulated projection on the anterior margin; the branch or discoi- 
dal veins usually wanting, leaving but the single rib-vein. Always 
oviparous, the agamic females never producing living larvae. Most 
of the species form galls on plants, usually trees, selecting the leaves; 
some also attack the roots of the plants on which they form galls. 
The young larvae have the tarsi, but one-jointed. 
This genus, like the rest of the sub-family to which it belongs, is 
without honey-tubes. 
