= Doue 
The territory in which the cotton perforator is known to occur has in- 
creased very greatly, as indicated by a survey of its distribution conducted 
by Mr. Barber and T. P. Cassidy. "While the most recent field reports have 
not yet been analyzed and checked, the perforator has been found to occur 
in Texas as far north as Graham, in Young County, or about 700 miles north of 
Brownsville. The territory known to be infested in Texas, therefore, in— 
cludes the major portion of the great cotton sections. In California iso- 
lated infestations have been found at Riverside and Escondido, at distances 
of 70 to 80 miles from the previous most northern and western points of in- 
festation A survey of the cotton sections of the San Joaquin Valley of 
California, however, failed to show the presence of any cotton perforator 
infestation in that territory. Since every known cotton area in Arizona 
and New Mexico has been found to be infested, the total infested terri- 
tory is assuming very formidable proportions and the potential possibilities 
of the species as a cotton pest are increasing with each new infestation 
discovered." Mr. Barber reports also of securing in September additional 
proof of perforator migration, through the agency of small trap plantings 
of cotton located 40-45 miles from the nearest cotton fields, all of which 
plantings became infested. In regard to its habit, he adds: "While the cot— 
ton perforator is essentially a leaf attacking species, it can also obtain 
sustenance from the calyces of the squares as well as from the walls of the 
cotton bolls. During the past two months examinations have been made of 
800 cotton squares, of which 534, or 66.7 per cent, showed the presence of 
the perforator mines. During the same period 885 bolls were carefully ex- 
amined, of which 81 bolls, or 9 per cent, were found to exhibit perforator 
mines. Of these 81 bolls 49 showed mines in the outer wall, while the 
remaining 32 bolls showed the mines on the inner wall." 
INSECTS AFFECTING MAN AND ANIMALS 
In studies on the relation of ticks to relapsing fever, W. G. Bruce 
has noted that in Texas "young buzzards are hosts to these ticks and also 
serve aS a means of transportation for the ticks from one locality to an- 
other," 
Refined mineral—oil soap and dipyridyl oil as materials for the con— 
trol of goat lice were investigated by 0. G. Babcock at Sonora, Tex. With 
regard to the tests with refined mineral oil soap, Mr. Babcock writes: 
"On July 29 the animals were dipped in this oil at concentrations of 1 to 
15, 1 to 30, and 1 to 45. The two weaker dilutions did not kill well but 
the stronger (1 to 15) apparently did a good job. However, when all these 
animals were sheared on September 25 one of the animals that was dipped in 
the oil at a dilution of 1 to 15 had four or five live and active lice upon 
it. The other animals were clean. This goes to show that 1 to 15 is the 
optimum strength and that it will require a still stronger dilution of l 
to 10 or 1 to 12 to be sure of a complete kill. Unfortunately this refined 
Oil appears to stain the mohair. Scouring tests to be made soon will deter— 
mine this point." In describing the test with dipyridyl oil, he says: "The 
animal that was dipped in this oil on July 29 was sheared on september 25. 
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