ee 
er in treating the dump." * * * 8,500 gallons of creosoted pine sap was 
sprayed where fiy larvae were found. From laboratory tests we estimated 
that it would require 12 hours to kill the treated larvae. We attempted 
to saturate the paper and garbage. * * * within 30 minutes most of 
the larvae were killed * * * The active larvae came into constant con— 
tact with this new insecticide. Of 24 one-quart samples of larvae and 
media taken from the dump after treatment, three samples prcduced viable 
pupae. In others a few undeveloped living larvae could be found. Tke 
viable pupae were found in wet paper and under pieces of broken glass. 
The creosoted pine sap did not penetrate the paper, which previously 
had been saturated with water. Also, it did not get under the broken 
pieces of glass. * * * The tests convince us that creosoted pine sap 
is effective in killing house fly larvae. The tests emphasize the need 
of keeping garbage separated from waste parer, so that it can be treated 
effectively." 
Goat 
lice yield to derris extract.—-"On March 26, 1932, 15 head 
of goats were di 
s 0 
h 
pped in derris extract (rotenone) at a strength of 1 to 
G. Babcock, Sonora, Tex. "The dipping was done immed— 
iately after shearing. The animals were dipped once only and turned out 
in pastures. On the fifth day following shearing all animals were rounded 
up and carefully examined. Not a single live louse could be found, 
thus apparently a 100 per cent kill. More time is required for defi-— 
nite information as to hatching of eggs. several of the above ani-— 
mals were heavily infested with Bovicola caprae Gult. and B. lirbatus 
Gerv." 
600," repor 
$ och 
Gastrophilus_ species in Illinois.--Reporting on the numbers and 
positions of Gastrophilus larvae taken from the stomachs of horses slaugh— 
tered at Galesburg, I1ll., on October 15, 1931, R. W. Wells says: "Dv 
appears that in this region Gastrophilus nasalis L. greatly outnumbers, 
in the host, the other two species. G. intestinalis De G. eggs seem 
abundant and are very conspicuous, but it aprears that G. nasalis is 
the more successful in gaining entrance to the host. As G. nasalis 
confines itcelf so exclusively to the duodenum, it seems possible that 
it may not be so vulnerable to prevailing larvicides as are G. intes- 
tinalis and G. haemorrhoidalis L., which confine their attachments al-— 
most entirely to the stomach." 
STORED PRODUCT INSECTS 
Subzero temperature kills Bruchus pisorum L.—-Tom Brindley, who 
has been making a study of the effect of freezing on the survival of 
the rea weevil at the Moscow, Idaho, sublaboratory, says: "Adults ex— 
posed without protection to a temperature of -16.6° F. were killed in 
less than 15 minutes. Adult weevils still in the reas were all dead 
at the end of 45 minutes." 
Staphbylinvs nigrellvs Forn eats rea weevil.--A. 0. Larson, Cor— 
aR, See ee ee oe ~— eS ee 
vallis, Sreg., reporting on an examination of a row of about 350 fence 

