70 
Pristiphora rufipes? St. Fargo. 
Of a pea-green color, head brownish-black or blackish. The seg¬ 
ments are slightly wrinkled, and there is on each side of the body 
a row of tubercles of the same color as the body. When full 
grown the head is of a lighter color. Number of feet, twenty. 
Length of mature larva about three-eighths of an inch. 
They are social, living in clusters on the leaves of the gooseberry and 
currant and devouring all except the coarser veins. When moving 
from leaf to leaf they spin a light w r eb, and when disturbed drop 
to the ground, spinning a web as they descend. 
The cocoon is brown, about the size and shape of a grain of 
wheat, and is found under the surface of the ground. 
The perfect insect is a black, four-winged fly with light-brown 
legs. 
24. Lophyrus abbottii, Leach. Abbott’s Saw-fly. 
The larvae of this saw-fly, like all the others of this genus, are 
social, that is, they live and feed together in groups of from fifteen 
to fifty. 
Body, dirty white, with four ragged, oblong, black spots on each 
segment, forming two rows along the back and a row on each side. 
The spots on the back become somewhat diffuse on the three latter 
segments, forming on the last a single black patch. Thoracic feet 
black; abdominal legs dirty white. When disturbed the larvae fling 
back the head and tail. Length, .80 of an inch. Number of feet, 
twenty-two. 
They are very destructive to the white pine, almost stripping it 
of leaves. 
The perfect female is .80 of an inch long, rust colored, under 
side and legs clay colored, antennae black, wings hyaline, tinged 
with yellowish. 
25. Lophyrus abietis, Harris. Fir-tree Saw-fly. 
Cylindrical and tapering, of a dirty green color, with two darker 
green stripes along the back, and two on each side; head and six 
forward legs black. Length of full grown larva, half an inch. Num¬ 
ber of feet, twenty-two. 
They form cocoons in crevices and under fallen leaves. Two 
broods appear each year, the perfect insects coming out in May, 
and again in August. 
The larvae feed on the leaves of the fir, spruce and pine, almost 
stripping the ends of particular limbs. 
Perfect female, .30 of an inch in length, of a yellowish color with 
a blackish stripe on each side of the middle of the thorax. Male 
smaller and darker. 
UROCERIDAE. 
This family contains the somewhat limited group of w T asp-like 
insects known as “Horntails,” so called from the long, prominent 
horn in the end of the abdomen in the perfect insects. They are of 
rather large size, resembling closely a wasp. 
