T54 Report or THE ENTOMOLOGIST OF THE 
V, p. 54), will be found a description of the male of Aphis 
brassicee by Curtis. A number of writers on entomology are 
quite positive that it must deposit eggs to survive the winter. 
In the collection of Aphididze at the lowa Experiment Station 
there is aspecimen of a male cabbage Aphis collected in August. 
This much is certain, that this Aphid survives the winter on cab- 
bage stored in cellars and pits, also that the cabbage stored in 
pits for seed purposes furnishes the supply of Aphids for infesting 
the seed-stalks in early spring. Prof. Webster* has found them 
in February on cabbage in the field in Texas. It is also a fact 
worth considering that the Cabbage Aphis has winged females in 
all broods observed throughout the summer. 
In conclusion, this Aphid apparently has been a pest on cab- 
bage in a wild state, where it probably followed the general rule, 
but owing to its hardy nature and the fostering care of man in 
developing the cabbage it has lost the habit of producing true 
females and males at any fixed period. In fact the latter only 
occur often enough to maintain the vitality of the stock. 
The main thing of interest to the gardener is how to get rid of 
the broods that survive the winter. With this idea in view the 
following tests were made the past fall. 
Remedies. [first -— Bisulphide of Carbon. 
September 21, 5:00 rp. m. Placed a head of cabbage badly 
infested with cabbage Aphis under a bucket in laboratory. Put 
about two fluid drachms (two small teaspoonfuls) of bisulphide of 
carbon in a saucer and placed it under the bucket. This was 
equivalent to about 44 fl. dr. of bisulphide to one cubic foot of air. 
September 22, 8:00 a.m. All insects dead. Plant injured. 
October 3. Put 50 cabbage heads, that were filthy with 
plant lice, ina pit 14 feet long, 13 inches wide and 20 inches 
deep. Two plates were set on the cabbage about seven feet © 
apart. Put 24 fl. dr. of bisulphide in each plate, covered the pit 
with two boards and buried six inches deep with earth. This 
was equivalent to two fl. dr. of bisulphide of carbon to every 
cubic foot of space occupied by air and cabbage plants. 
October 6. Took cabbage out of pit. Not a living insect 
could be found. None of the heads appeared to be injured. 

* Bull No. 51, Ohio. Agrl. Exp. Sta., p. 109. 
