-145- 
Storaoxys calcitrans (L.) , the stablefly 
An open milk shed, including the floor, was dusted thoroughly with 
a 3- percent DDT dust on September 18 and again 3 days later. Before 
dusting the flies were so numerous it was almost impossible to milk the 
cows as both cows and milkers were severely attacked. Three days after 
the second application only an occasional fly was observed. The legs 
of the cows were also Ousted with the 3-percent dust without any 
observable harmful effect. — Ewart ( 145 ) • 
See Mjsca domestica . — Dove (137 ); Freeborn ( 160) ; Munro et al. (271); 
N. J. Agr. Expt. Sta. (275); Ross"T|06) . 
Stomoxys spp. 
An extraordinary reduction of Stomoxys , in West Africa, followed 
the spraying of one cow out of a small herd of a dozen animals whioh were 
suffering very greatly.— Buxton (100 ) • 
Oestridae 
Hypoderma bovis (Dog.), the northern cattle grub 
Gesarol A spray 7.8 pounds (DDT 0.4 pound) per 100 imperial gallons 
of water sprayed on animals at 400 pounds pressure had little effect on 
warbles, killing only 5.5 percent as compared with 73.9 percent by a 
5-percent rotenone mix at 250 pounds' pressure. — Ross (306). 
DDT is a contact poison. — Domenjoz (135). 
H. lineatum (De Vill.), the common cattle grub 
Same as for H. bovis .— Ross (306 ) . 
Psilidae 
Psila rosae (F.), the carrot rust fly 
In Switzerland the injury caused by the first generation of the 
carrot fly can be controlled by watering the carrot crop in mid-May with 
a 0.5 to 1.0 percent Guesapon emulsion at 4 liters per square meter. 
The control of the more serious second-generation injury can be achiev- 
ed by watering the crop with 2 percent Guesapon at 4 liters per square 
meter in mid-July.— Geigy Colour Co. (166). 
Gesarol A-3 (3 percent DDT) was dusted on the crowns of the plants 
at the rate of 1/2 pound per 100 feet of row. Three applications on 
July 13, 21, and 28, were made and the orop was lifted September 1. 
Little or no control resulted, the infestation being 29 percent in the 
