y=) 
destroyed the Gambusia. An attempt was made to seine out the predacious 
species after the waters receded, and, although thousands were removed, 
there were probably enough remaining to kill a great many mosquito—kil-— 
ling fish. It was likewise difficult for the Gambusia to maintain their 
numbers because of the lack of aquatic vegetation and other shelter. 
Other ponds in the vicinity in which no game fish were present contained 
satisfactory numbers of the Gambusia." 
Flytraps recuce myiasis.--E. W. Laake submits a brief summary of 
the data obtained by himself, E. C. Cushing, and H. E. Parish in Menard 
County, Texas, and adjoining counties. He says, "the results for 1932 
show a reduction of 42 percent in the percentage infestation of an aver— 
age monthly population of 122,982 animals of all classes in the trapped 
area, aS compared to an average monthly population of 70,462 animals of 
all classes in the control area. * * * the average reduction in population 
of the screw-worm fly in the trapped area from March 30 to October 29, 
1932, as determined by the jar method, was over 57 percent: These re- 
sults, in the absence of any other known variations of importance be— 
tween the two areas, indicate that the 42 percent reduction in myiasis and 
the 57 percent reduction of the fly population in the trapped area were 
due to the systematic operation of the flytraps." 
STORED PRODUCT INSECTS 
Effect of temperature on different stages of cigarette beetle.— 
W. D. Reed, Richmond, Va., reports that "It was necessary to expose ad— 
ults (of Lasioderma serricorne Fab.) to an average temperature of 26.29° 
F. for 85 hours in order to obtain a 100 percent kill. A 70 percent kill 
was obtained after 39 hours' exposure at the above temperature. As an 
average temperature of 23.04° F. all of the test adults were killed by an 
exposure of 21 hours. All of the test pupae were killed in 15 hours at 
an average temperature of 26.29° F. When the temperature was lowered to 
an average of 23.04° F. all pupae were dead after 7 hours' exposure. The 
larvae showed a greater resistance to cold than did the adults and pupae. 
After an exposure of 162 hours at an average temperature of 26.29° F., 
97 percent of the larvae were dead. After 85 hours at that temperature 
80. percent of the test larvae were dead * * * None of the larvae were 
killed by an exposure of 15 hours * * * After an exposure of 146 hours 
to an average temperature of 23.04° F., 93 percent of the larvae were 
killed. After 21 hours only 43 percent of the larvae were killed." 
Buried traps capture more nitidulid larvae than do surface traps.—— 
Reporting on winter trapping of dried fruit insects, Perez Simmons, 
Fresno, Calif., states that "2 traps baited with moistened cull dried 
reaches were set at a fruit dump near Round Mountain. One trap was bur-— 
ied to the top and the other was set on the surface of the ground. * * * 
The trap on the surface took no beetles until the collection of January 
14. This trap captured a total of 17 Carpophilus hemipterus L. and 3 
