20 
sect was destroying newly planted corn in that county by eat¬ 
ing* out the substance of the germ, sometimes as many as three 
01 foui larvae to a single kernel. The field had been to pasture 
previously—partly blue grass and partly timothy. Other fields 
of the neighborhood were abundantly infested, but only where 
the ground had been in grass the preceding year. 
May 30, 1883, the same larva was observed at Towanda, 
McLean county, abundantly infesting corn on old sod, and 
other similar observations were made to July 10 of that year. 
Description. Egg — Length, .31 mm. Oval, white, smooth, 
slightly flattened at the ends when they are pressed one against 
another. Lxtruded by the female in strings. 
Larva— The larva is cylindrical, smooth, white, except the 
head, which is jet-black. The body is divided into twelve seg¬ 
ments, not including the head, the three anterior of which are 
shortest, and are frequently somewhat retracted within each 
other. The terminal seg’ment of the body is bent abruptly 
downward beyond the middle and constricted before the tip. 
Ihe body is soft and flexible, and the movements of the mag¬ 
got are sluggish. 
. The head, viewed from above, is broad-ovate in outline, narrow¬ 
ing forwards, and somewhat abruptly rounded in front. It is 
smooth and shining, about as long as the first segment, within 
which it is frequently more or less retracted. Its width is about 
three fourths its length. The entire larva is one third of an inch 
in length when full grown, and about one fortieth of an inch in 
transverse diameter, and of nearly uniform size throughout, only 
the first two or three segments being slightly narrower than 
those succeeding them. It is marked with neither hairs nor 
punctures, and provided with no locomotor structures whatever. 
Pupa. Length 3.6 mm.greatest width, one third the length. 
In general color the pupa is yellowish white, the yellow predom¬ 
inating on the head and thorax. The eyes are black; antennae 
tinged with brown, which is darkest towards the base; the front 
has two rather large prominent brownish tubercles or projec¬ 
tions, one on each side of the median line, just above the base 
of the antennae. A brownish bristle arises from each of the 
tubercles. Prothorax and anterior margins of the wing pads 
tinged with brown. The anterior stigmata are on the sides of 
the thorax, over the eyes, the antennae intervening in a broad 
transparent tubercle which contains in the center an oblong ele¬ 
vation with four elongate transverse black spots. Dorsum of 
thorax and abdomen with microscopically minute brown points. 
Ihe penultimate segment has a lateral plication on each side, 
and the last segment is bilobed beneath, with a pair of conical 
prolongations, thickly beset with scabrous points, extending 
backward from each side. 
Female. Length 3 mm. exclusive of ovipositor, which is about 
.6 mm. in length. General color blackish. The head is black; 
antennae brownish black, with sixteen cylindrical joints united 
