-129- 
oheck, 166 dead, 468 living, mortality 35.4 percent.— Ross (306 ) . 
Hylemya brassicae (Bouohe), the eabbage maggot 
These flies are controlled by watering each plant with 100 cc. of 
1 percent Guesapon at the time they are set out*-- Geigy Colour Co. (166 ) . 
The cabbage maggot was not controlled by eight applications of 5 
peroent DDT in light summer spray oil, average about l/2 gallon per acre, 
made by hand atomizer from June 6 to August 1.— Gray ( 188 ) . 
Dusts were applied from shaker cans at the rate of 20 pounds per 
acre. Applications were made before egg deposition by adults, and 11 
days later the DDT dusts (2 and 4 percent) gave only slightly better re- 
sults than the checks. Calomel (4 percent) gave 96.4 percent reduction 
of the maggot population.— N. J. Agr. Erpt. Sta. (275 ). 
Hylemya floralis , radish fly 
Same as for H. brassieae.— Geigy Colour Co. (166) • 
Calliphoridae 
Calliphora vomitoria (L.) 
■ ■ ■ ■ ■ ■ ii it. 
DDT is a contact poison.— Domenjo z (135 ) . 
Luoilla (« Phaenioia ) sericata (Meig.), greenbottle fly 
Laboratory tests showed than an emulsion containing 0.5 percent of 
DDT was toxic to laboratory-bred flies dipped in it. Welsh mountain 
sheep dipped in a bath containing C 3786 peroent of DDT remained free 
from strike for 42 days. The effectiveness of the dip lies in its 
direct action on the blowfly. Tests in which gravid females of L. 
sericata were kept in contact with the fleece of a DDT-dipped sheep 
showed €hat even 5 weeks after dipping 30-60 seconds' contact was 
sufficient to have a toxic effeot on the flies.— Cragg ( 124 ) . 
Luoilia caesar (L«) 
Same as for Masoa domestioa .- Ross (306 ) • 
Chironomida© 
Fhlebotomus spp., sand flies 
In Panama two tests were made in whioh houses were sprayed inside 
