246 TWENTY-FIFTH ANNIVERSARY REPORT. 
for as much or more damage than the cabbage caterpillars. It 
injures the cabbage in the seed bed as well as in the field, and 
causes a large amount of damage to seed cabbage by injuring 
the seed stalk, so that in some localities no seed is produced. The 
aphis survives the winter on cabbage stored in cellars and pits, 
and also on plants stored in pits for seed purposes, which facili- 
tates an early attack on the seed stalks in the spring. To free 
cabbages of the broods that survive the winter, the use of carbon 
bisulphide was recommended, and tests were made in 1894 to 
test the value of this treatment. 
With the completion of the tests it was recommended that seeds- 
men who raise cabbage seed should open the pits a few days before 
the time to set the cabbage in the fields and fumigate the plants 
with carbon bisulphide, using one teaspoonful for each cubic foot 
of space. After the distribution of the liquid the pit should be 
closed and not opened again for at least two days. For the treat- 
nent of infested cabbages in the field, kerosene emulsion diluted 
with ten parts of water proved the most efficient remedy. 
THRIPS. 
(Thrips tabaci Lind.) 
This insect ordinarily causes no marked damage but in some 
seasons its injurious work is sufficient to cause the outer leaves 
of the second crop of cabbage to die. Mention® was made of this 
species as a matter of record. The thrips is controlled by the same 
remedies that are employed for the cabbage aphis. 
HARLEQUIN CABBAGE BUG AND OTHER CABBAGE INSECTS. 
(Murgantia histrionica Hahn.) 
In Bulletin 83, on the cabbage insects, attention is directed to 
the appearance of this southern cabbage pest on Long Island where 
it was found feeding on radishes, near Jamaica, L. I. Other in- 
sects of lesser importance discussed in this bulletin are the zebra- 
caterpillar (Mamestra picta Harr.), the cross-striped cabbage worm 
(Evergestis rimosalis Guen.), the southern cabbage butterfly 
(Pontia protodice Bd.), and the stalk borer (Papaipema nitela 
Guen.). | 
