508 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
the University of the State of New York in 41st report X. Y. State 
Museum Nat. Hist, for 1887. 
Mr. Bhelbj Seed, of Scottsville, Monroe County, N. V., sends leaves of the yellow 
birofa, Betula lutea, Infested with a small caterpillar, which an- very numerous (forty- 
eight had been OOOnted on a single leaf) and cat t he upper end lower surfaces of the 
leaves, leaving only the transparent inner tissue. "The trees infested with them 
have a brown and BOOrohed appearance, and light conies down through the thickest 
foliage as through a softened skylight." 
The caterpillar is 0. 18 to 0. 22 long, slender, deeply incised at the joints, tapering 
at the extremities, and suhcylindrieal ; head pale hrowu, slightly hilohed, ocelli and 
mandibles black, mouth-parts projecting: body dull, pale green, bearing a few short 
hairs on the usual spots and longer ones on the first segment; termiual pair of pro- 
legs projecting. Walks slowly and hangs by a thread when it falls. 
A few of the larva* had spun cocoons on the surface of the leaf when received. On 
the following day nearly all had made or were engaged in making their cocoons. 
The moth. — The ornamentation of this species differs from that of any other yet found 
in this country, and though allied to B. eidarella of Europe, it is still quite distinct. 
Head white, tuft tipped with dark reddish brown, and the face faintly tinged with 
purplish fuscous. Upper surface of the thorax brown, margined all around by white. 
Base of the fore wings white, followed by an oblique brown fascia, which is nearest 
the base ou the costal margin, and is followed by an oblique parallel white fascia; 
all of these are placed before the middle, and are followed by a large brown patch 
which occupies the entire wing to the ciliae, except that it contains a white spot on 
the middle of the costal margin. The brown patch is margined before on the dorsal 
margin of the wing by a small tuft of raised brown scales. At the beginning of the 
dorsal ciliae is a white spot placed a little before, but becomes almost confluent with 
a longer white costal streak. Behind these streaks to the apex the wing is pale 
brown, with a darker velvety-brown apical spot. Ciliae pale yellowish, with a darker 
brown hinder marginal line before their middle, not extending into the costal ciliae. 
Hind wings pale fuscous. Expanse of wings, f inch. (Chambers.) 
78. Tineid larva. 
The white silken round cocoons of this Tineid were noticed during 
the first week in September at Brunswick, Me., on the upper surface 
of the leaf of the white birch, the larva previously feeding exposed on 
the upper surface and eating little patches ou the upper side. 
Larva. — Body cylindrical, pale greeuish; head pointed in front, much narrower 
than the first thoracic segment ; five pairs of abdominal legs, the last pair long and 
slender, directed backwards. The hairs sparse, and about two-thirds as long as the 
body is thick, arising from whitish, distinct, piliferous warts. The segments are 
quite convex, the sutures well marked. Length, 5-6 mm . 
Cocoon. — Orbicular, 2 to 3 mm in diameter, of white silk, inclosing the larva, which is 
curled up within. 
79. Leaf-blotch miner. 
The blotch mines of this Tineid were observed July 6 to 10 at Bruns- 
wick, Me., ou the yellow birch. Usually the larva makes one or two 
mines on the under side of the leaf between the secondary veins, either 
near the midrib or nearer the edge of the leaf. They are irregularly 
oval, rounded at each end, forming a brown patch about 10 mm long by 
■4-5 mm wide. On the upper side of the leaf the mine is outlined by a 
whitish oval line. July 10 most had left the mine, leaving a small mass 
of black "frass." In some cases the edge of the leaf was turned over 
or folded over at the apex. 
