4 
91 
legs. Wings erect in*repose, of usual form, third discoidal vein twice 
forked, transparent; veins slender, slightly dusky, the stigma elongate 
fusiform and rather slender; the subcostal vein for- some distance 
from the base recedes somewhat from the costal and then at about 
two-thirds the distance approaches the costa; the first vein about three 
times as far from the second, at the tip as it is at the base; the sec¬ 
ond is slightly farther from the base of the third than the base of the 
first. The second fork arises near the apex of the wing; the stigmatie 
vein curves somewhat sharply at the base, and then is nearly straight 
to the tip, 
The following notes received in reference to this species in 1877 
are appended. 
E. Hall, Athens, Menard county, July 16, 1877 : “Plant lice on the 
roots of corn did considerable damage in 1874. Not perceptibly in¬ 
jurious since ; and then confined to limited areas, on old lands.” 
E. R. Boardman, M. D., Elmira, Stark county, Nov. 27, 1877 : “On 
the 19th of May, one of my neighbors came to get me to go and ex¬ 
amine a field of corn that he said was being destroyed by something, 
and he could find nothing that could account for it. I found the 
corn about three inches high, and hundreds of hills withering and 
dying ; and on careful examination I found the roots and base of the 
culm, below the ground literally swarming with Aphides. I think 
from some hills I could have gathered a teaspoonful of the little crea¬ 
tures. I estimated about one-fifth of the stand of corn in that field 
to be then destroyed by them. There had been a crop of rye raised 
on the ground the season previous. I had before seen slight injury 
from Aphides, but nothing to compare with this.” 
The same, under date of December 5, in answer to some inquiries. 
“ I find, on referring to my notes, the specimens sent were collected 
on the 22d day of May. The field was planted the 10th of May.” 
The same, under date of December 12. I had intimated in reply 
to one of his letters, that it was rather singular that they should ap¬ 
pear there in such numbers when corn had not been raised on the 
field the previous season. He says : 
“ In regard to those Aphides, it appeared singular to me that they 
should exist in such numbers in that field, while in an adjoining field, 
separated only by a road, there were only a very few specimens found, 
and nO injury sustained from them. This adjoining field had been 
cultivated in corn for several years ; and the only way that I could 
account for it was, that the field where they were found had a hazel 
copse along one side of it, and that they may have come out of that, 
as thev were worse on that side of the field.” 
t 
Aphis brassic^e, Linn. The Cabbage .plant-louse. 
A careful examination of our species during the past summer, and 
a comparison with carefully colored figures of the European species, 
have satisfied me that the two are identical. It must have been in¬ 
troduced at an early day, as Dr. Fitch has shown conclusively that it was 
known in this country as early as 1791. It is the most common and, per¬ 
haps, the most injurious species known to the vegetable garden in this 
country. 
