STATE AGRICULTURAL SOCIETY. 
749 
SPRUCE. FIR. 
shining leaf-hopper 0.20 long, tapering posteriorly and broadest 
across the base of the thorax, with a light yellow head having 
the mouth black and also two bands upon the crown the ends 
of which are often united, and commonly with a white streak 
on the middle of the inner edge of the wing covers, its legs be¬ 
ing pale yellowish varied more or less with black. I first met 
with several specimens of this insect eleven years since, upon 
the black spruce and Fir balsam, on the summit of the Green 
mountains, in an excursion hither with that martyr of science, 
the late Prof. C. B. Adams. Since then I have repeatedly cap¬ 
tured this same insect upon birch trees, distant from any 
spruces, and it is possible it might have been accidentally pre¬ 
sent on these latter trees in the instance first mentioned, there 
being numerous birch trees in the same vicinity. 
283 . Fir-tree saw-fly, Lophyrus Abietis, Harris. (Hymenoptera. Ten- 
thredinidse.) 
In June and July, stripping all the leaves from the ends of 
particular limbs of the spruce and the pine, clusters of cylindri¬ 
cal tapering worms with twenty-two feet and otherwise anala- 
gous to those of the pine, No. 273, but only about half as largo 
and of a dirty green color with two darker green stripes along 
the back and two upon each side, their heads and six forward 
legs black; forming cocoons in crevices and under fallen leaves; 
the perfect insects appearing in May and again about the first 
of August; the females larger than the males and measuring 
0.30 to the tip of the abdomen, of a yellowish brown color with 
a short blackish stripe on each side of the middle of the thorax, 
transparent wings, and antennee with nineteen joints. See 
Harris’s Treatise, p. 411. 
I suspect Dr. Harris’s observations upon this species were 
not full, and that like the analagous saw-fly which we have 
noticed on the pine, No. 273, there are two generations of this 
species annually; for wo are informed that the perfect insect 
appears in May, producing a crop of worms in June and July, 
from the cocoons of which the perfect insect come out the last 
oi the latter month. But Dr. Harris supposes the most of these 
cocoons remain unhatched through all the hot weather of Au- 
