884 FIFTH REPORT OP THE ENTOMOLOGICAL COMMI88ION. 
pean species, and the cocoons arc <>f the size and form as figured by 
Katzeburg. A description of the fully grown larva is not given by 
Katzeburg. The e^i;s are described by Katzeburg (after Tischbein) as 
about one-half a line i.V") long, white, transparent, laid in a row upon 
and within the young larch shoots. The following is a free translation 
of his description of the saw tly, which lie calls the large larch saw rly, 
and figures in Theil III, PI. Ill, Fig. 4. 
I t<)."> long and fringe expanding 1<> to 11 . In Mnlptnring and coloring so great 
a similarity with A'. teptentrionalU J that it would be mistaken for it were it not 
for the tarsal snoop-like dilatation in latter species; hut there ie in place of the wing- 
band only a light shade in the largest cubital cell ; both the femoral hooks and apoph- 
:<• almost clear, the wing-angle of the prothorax brownish white: the whitish 
femoral rings are only clear on the hinder legs, and on the abdomen at most the four 
middle rings are reddish-brown. The punctures are liner than in X septentrionalis, 
tally on the scutellum and on the rather shining mesosternum. 
Katzeburg states that he himself has not observed this insect, which 
occurs iu Germany and other parts of Europe. It appeared on the 
larch in the Harz Mountains as well as on the plains of Holstein. The 
larva* are social, but do not occur in such thick, crowded clusters as do 
those of Lophyrus. The flies make their appearance toward the mid- 
dle of June. The eggs are laid usually in a single row on the upper 
end of the young shoots, two or three sometimes being placed together 
along the shoot. The eggs are inserted in a little slit made by the 
ovipositor under the epidermis. They hatch at the end of June and early 
in July, and the larvae stop eating, becoming fully grown, toward the 
middle of August. They then fall from the trees and spin their cocoons 
under the moss ; here they pass the winter, and in the following May 
enter the chrysalis state within the cocoon, to appear as four-winged 
rlies in June. From a forestry point of view, adds Katzeburg, the insect 
might become injurious since the larvae have already in certain seasons 
abounded on the larches in sufficient numbers to attract the attention 
of forestry officers in Holstein. 
The habits of the American worm are evidently like those of the 
European species; and it is very probable that the insect is common to 
both Europe and Northeastern America. At any rate our species could 
not have been introduced with European larches, since its ravages have 
been committed in the wilder, less frequented portions of Maine, New 
Hampshire, and New York, as well as on the sea-board in towns long 
settled. In brief, the habits of our species are as follows : The eggs are 
laid in the terminal young shoots of the larch from about the middle 
of June, in Massachusetts, to the early part of July in Northern Maine, 
the larva? feeding on the leaves late iu June and in July and early 
August. By the last of July to the first week in August, according to 
the latitude, the worms are nearly fully grown, while a few half-grown 
ones occur on the trees in Maine in the last week of August and the 
early days of September. It is very doubtful whether there are two 
broods. We will now give a more detailed account of its habits. 
