STATE AGRICULTURAL SOCIETY. 
551 
themselves, until the corn is cut down or ripens and the sap 
ceases to circulate in the stalks, whereupon they perish. They 
occur upon no other part of the stalk except the peduncle or 
stem which bears the ears. And such a multitude of them as is 
found clustered together upon this stem, of course abstracts 
from it much of the sap which should go to nourish the ear and 
swell the kernels. Should these insects, therefore, ever become 
multiplied so as to infest a considerable portion of the ears in a 
field, it is evident they would do much injury to the crop. And 
like other kindered insects, it is probably they will at times 
become thus multiplied. 
These insects belong to the family Aphid.*: in, the order 
Homoptera, and to the genus Aphis. They are plainly a different 
species from one which infests the maize in Europe, the Aphis 
Ze<e, of Bonafous, described in the Annals of the Ent. Soc. of 
France, vol. iv, p. 658, and I propose to designate them the 
Maize Apiiis, A Maidis. The remedies for insects of this kind 
were treated of in my first report, under the apple plant-louse, 
and it only remains for me to give a description of this species in 
the different stages of its growth. 
The i,arva, when newly born, is 0.03 in length, with the opposite sides of its 
body parallel, or very slightly wider posteriorly; of a yellow color, the hue of bees¬ 
wax, the head pale watery yellowish ,thc eyes black, the antenna:, legs and beak white, 
the latter long, reaching beyond the base of the hind legs, the nectaries or honey 
tubes short, merely slight tubercular elevations, and white. These, I think, are 
individuals which are destined to acquire wings, whilst those which are to remain 
without them are pale green, much the same color with the surface on which they 
are placed, the thorax and the tip of the abdomen greenish white, the head slightly 
dusky, and the tips of the antennae, legs and beak acquiring a blackish tint soon 
after birth. 
These latter larva: grow to an oval form and a dull green color, with the head and 
thorax blackish, the abdomen above with two rows of black spots along the middle, 
the anterior spots confluent transversely, forming a short band, and with three bands 
at the tip, and an additional row of black spots upon each side. 
The wingless females arc dull blackish faintly tinged with green, the color 
obscured by a glaucous bloom or fine powder with which they are dusted over, the 
head and commonly two bands upon the thorax smooth and black, with spots of the 
same along the sides of the abdomen and sometimes upon its middle also, the tip 
of the abdomen drawn out to a black point with two smooth black bands forward 
of it, the nectaries black and their length about half equalling the distance from 
their base to the tip, the antenna: black and nearly half as long as the body, tlio 
legs black with the shanks whitish except at their tips. They are of a plump oval 
form, rather broadest back of the middle. Their beak is pale, its tip black; it 
arises from the lower part of the head and reaches only to the base of the middle 
legs, between which is a deep groove for its reception when at rest. 
