INSECTS INJURIOUS TO THE LOCUST. i 
worm which passes the chrysalis state in the leaf, the latter falling to the ground, 
and the following June giving out a minute moth. 
This is a common leaf-miner of the locust in the New England as well 
as the Middle States. Out of the seventeen leaflets which form the 
locust leaf, usually two or three and often more make the blotches. The 
mines are not tenanted, Clemens states, at the time the leaf is mined by 
Lithocolletis robiniella (Clem. Proc. Phil. Acad., 1860). 
The larva makes a pale yellowish mine, usually on the midrib, with 
lateral branches running out from it. It pupates in a small nidus on 
some object on the ground. 
The moth.—Fore wings fine brown, somewhat golden, shaded with dark brown. 
Along the costa are three oblique silvery streaks; on the inner margin are three sil- 
very dorsal spots, placed opposite the spaces between the costal streaks. Near the tip 
of the wing is a transverse narrow curved silvery line, passing from the costa to the 
inner angle. (Clemens.) 
4, THE GREATER LOCUST-LEAF GELECHIA. 
Gelechia pseudacaciella Chambers. 
Order LEPIDOPTERA ; family TINEID £. 
From eggs laid on the under surface of the leaf hatches a green larva with reddish 
head and thoracic plate and six longitudinal dusky stripes; spinning a slight web 
between two leaves ; changing toa moth in late spring, whose wings expand 0.63 inch. 
It is sombre in color, the fore wings dark slate, flecked with brown and white; the 
hind wings pale slate, whitish towards the base. 
5. THE LESSER LOCUST-LEAF GELECHIA. 
Gelechia robiniefoliella Chambers. 
Spinning two locust leaves together and feeding between them, leaving the outer 
surface and the larger ribs untouched, a minute, greenish white slender larva, which 
transforms to a chrysalis in the same situation, the moth differing from its closely allied 
species in the palpi being slender and rather long, while the hind wings are emargin- 
ate beneath the apex. (Comstock and Chambers. ) 
6. THE AUTUMNAL LOCUST LEAF-MINER. 
Lithocolletis robiniella Clemens. 
Mining the underside of the locust-leaf late in September and early in October (in the 
Middle States) a cylindrical larva, with a pale brown head and the body greenish 
white, sometimes spotted with yellow; the chrysalis contained in a white silken 
cocoon within the mine, and transforming late in October and early in November into 
a minute moth with narrow pointed fore-wings, which are golden yellow along the 
costal edge and with a spot at the tip. 
The species of Lithocolletis are known by their small size, the narrow, 
pointed fore wings, the tuft on the top of the head, and the simple, not 
ciliated antennze. The larvee mine the upper and under side of leaves 
and usually transform within a silken cocoon in their burrows. The 
present species is one of the best known of the genus. 
The larva.—Body cylindrical, the head pale brown; the body pale greenish white, 
with a red median dorsal line from the 5th to the 9th segment; on the 9th segment 
are two irregular chrome-yellow patches, which are sometimes wanting. (Clemens. ) 
The moth.—Antenne dark brown; front of head silvery white, the tuft dark brown 
