30 OUR SHADE TREES AND THEIR INSECT DEFOLIATORS. 
ject and of striking appearance (Fig. 14). The head and two little ele- 
vated spots situated on joints 9 and 10, are bright vermilion-red; the 
back is velvety black with two bright yellow subdorsal lines, and 
another yellow line each side along the lower sides. The whole body is 
thinly clothed with long pale yellow hairs, originating from small wart- - 
like elevations. Four cream-colored or white dense brushes of hair 
are in a row on the middle of the fourth, fifth, sixth, and seventh dor- 
sal joints, while from each side of the head arises a long plume-like tuft 
of black hair projecting forward and outward. A similar plume pro- 
jects upwards from the last dorsal joint. The hairs composing these 
plumes are coarse, barbed, knobbed, and arranged in sets of unequal 
length, thus giving the plumes a turbinate appearance. 
Habits of the Larva.—The young caterpillars scatter all over the tree 
soon after hatching. When disturbed they make free use of a fine 
silken thread which they spin, and by which they let themselves down. 
The fell-grown larve are often seen to change quarters and travel from 
one’ branch to another, or from one tree to another. Their rather quiet 
way of moving contrasts strongly with the nervous movements of the 
Fall Web-worm. 
A new Form of Orgyia Attack.—In the first edition we omitted to make 
mention of a most interesting account of a new form of Orgyia attack 
which had just been published at that time by Mr. Lintner in his sec- 
ond report as State entomologist of New York. Wecan not now do 
bett r than to insert Lis account of this peculiar injury in his own 
words. It is an interesting instance of a new habit having been locally 
acquired, and, so far as we have been able to ascertain, it has been 
observed nowhere else— 
‘‘in the summer of 1883, contemporaneously with the first appearance 
of the Orgyia attack upon the foliage, between the 10th and the 15th 
of June, the sidewalks, streets, and public parks in Albany, wherever 
the white elm (Ulmus Americanus) was growing, were observed to be 
sprinkled with newly-fallen leaves. They continued to drop in increas- 
ing number until toward the close of the month, when, in many places 
where they had been permitted to lie undisturbed, they completely 
covered the walks or ground. 
“Upon taking some of them up for examination, they were found to 
be attached to the tips of the twigs and to comprise nearly all of the 
new growth of the season. The pieces were from 2 to 3 inches in length, 
each bearing from four to ten fresh uninjured leaves. It was evident 
that they were not being broken off by unusually high winds, for even 
in the absence of winds each day continued to add to their number 
and to increase the abundance of the fall. 
“Making critical observation for the discovery, if possible, of the 
cause of SO unusual a phenomenon, it was noticed that from above the 
point at which the tip had been broken the bark was entirely removed 
for an extent averaging one-tenth of aninch. The manner of its re- 
moval showed it to have been eaten by an insect. The suggestion was 
made to me that it was the work of some small insect of similar habits 
to those of the twig girdler, Oncideres cingulatus (Say), but the closest 
examination failed to show either scar or egg within the tip. 
