ay Pow. 
Observations on resistance of red spider to hot water.--F. F. 
Smith, , of the greenhouse insects laboratery, reports that "In the 
course of contemplated control studies for the cyclamen mite 
(Zarsonems pallidus Bks.) on gerbera, to be conducted at Babylon, 
. Y., by means of hot water, the grower desires to know whether the 
same treatment will alsa ein teat the common red sider (Tetranychus 
bimaculatus Harvey). In one series of tests with water at 110° F., 
the red spider was not killed by a 50-minute or shorter immersion. 
Apparently adult females were killed by a 30-minute or longer treat- 
ment. The eggs are evidently more resistant than are the other forms. 
Although the observations on the resistance of the varicus stadia are 
not extensive, the test indicates that hot-water treatment will not 
rid most growing plants, including the highly tolerant gerbera, of 
red spiders. 

Vacuum fumigation with ethylene oxide-carbon dioxide mixture ef- 
fective against cisarette beetle.--ii. D. Reed, of the Richmond, Va., 
laboratory, reports that in recent vacuum fumigation tests with the 
ethylene oxide-carben dioxide mixture (carboxide) a mortality of 100 
percent of the cigarette beetle (Lasicderma serricorne Fab.) in 
Turkish tobacco was obtained. In these tests a dosage of 46 pounds 
of the fumizgant were used per 1,U0U cubic feet, with exposures rang- 
ing from 3 to 3$ hours. sanbioe of infested Turkish tobacco fumi- 
gated with this same mixture by a large commercial firm were submitted 
to Mr. Reed and his associates for examination and it was found that 
luG percent mortality of the beetle had been obtained. 

A Simple date finder or calculator to determine calendar inter- 
vals.--To expedite the routine process of ascertaining calendar inter- 
vals in determining duration of life-history stages and similar 
entomological phenomena, liodney Cecil, of the Ventura, Calif., labo- 
ratory recently submitted an article detailing the construction of a 
home-made. device, consisting essentially of two machined and numbered 
disks, which by proper manipulation added accurately und rapidly the 
duration of any calendar period up to and including 365 days. This 
article was intenced for inclusion in the Entomological Technique 
series, but before publication (and unimown to Dr. Cecil) this same 
idea appeared in a supplement to The Gladiolus Review of January 1934, 
under the name of the "Cantelc dute finder," for use in determining 
the blooming dates of gladiolus and other bulbs, cf which the period 
from planting te flowering was known. This chart was criginated by 
Walter Cantelo, of Hoosick, N. Y., who passed the copyright to the 
American Gladiolus Society at Goshen, Ind. 


Special committee crgsnised to combat the vinegar enat.--At a 
meeting of the Tri-State Packers! ERT Baltimore, Md., on 
April 10, a s ecial committee was organized to develo; control methods 
for the eTit pe eeon of maggots of the vinegar pnat (Drosophila 
te 
