114 INSECTS INJURIOUS TO FOREST AND SHADE TREES. 
behind with black, and on the terminal one two whitish dots, with a small black 
patch at their base. Spiracles pale oval, edged with black. Under surface palerand 
greenish, feet greenish, prolegs bluish-green dotted with brown. The moth is rather 
large, with broad triangular fore wings, and is uniformly brown, with two oblique 
darker bands. 
20. THE MAPLE LEAF-CUTTER. 
Incurvaria acerifoliella (Fitch). 
Order LupmpopTerRA ; family TINEID. 
Cutting round holes in the leaves and consuming their pulp in rings and semi-cir- 
cular spots, and using the round pieces to hide the small white worms between them 
and the leaf, forming a broad round case adhering to the surface of the leaves. 
This larva with its singular case has been described by Fitch, and 
we have received specimens of maple leaves and cases from Vermont. 
Early in August the leaves of forest trees begin to wither, and holes 
appear in them, the orbicular pieces being taken by the little worm to 
form a broad scale concealing it. The worms fall with the leaves to the 
ground in the autumn, and there remain transforming in their cases, 
and late in the spring appear as moths. 
The larva.—Nearly a quarter of an inch long; slender, cylindrical, soft, and eon- 
tractile; dull white; head flattened, and, like the three succeeding segments, pale 
rusty brown. 
The moth with long narrow pointed wings ; the fore pair brilliant steel-blue, the hind 
wings smoky brown, with purplish reflections. Between the antenue a dense tuft of 
erect bright orange-yellow hairs. (Fitch.) 
The following insects also infest the maple: 
21. Gastropacha americana Harris. (Lintner, Contr. iii.) 
22, Nadata gibbosa Sm.-Abb. (Lintner, Contr. iii, 150.) 
23. Nematocampa jilamentaria Guen. (Lintner, Contr. ili, 165.) 
24. Amphidasys cognataria Guen. (Lintner, Contr. iii, 166.) 
25. Heterophelps triguttata H.-Sch. (Saunders in Packard’s Monogr. 
Phaleenide. ) 
26, Lithocolletis aceriella Clemens. Larva ina flat blotch mine in upper 
surface of leaves. 
27. Lithocolletis lucidicostella Clemens. ) Larvee in tentiform mines in un- 
28. Lithocolletis clemensella Chamb. § der surface of leaves. 
29. Gracilaria packardella Chamb. Larva rolls the leaf downward into 
a conical figure. 
30. Catastega aceriella Clems. Larva only known. It at first mines the 
leaf, and afterwards constructs a case of its frass. (Does not 
belong to Tineide ?) 
31. Xylotrechus colonus (Fabricius). Found by Mr. G. Hunt under the 
bark of an old sugar maple in Northern New York. 
HEMIPTERA. 
32. Psylla annulata Fitch. Occurs on the sugar maple. 
33. Siphonophora acerifolie Thomas. On soft maple, Acer dasycarpum, 
Iowa, Hlinois, and Missouri. 
