-106- 
although lead arsenate was not applied after the calyx spray of May 
16 •— German (217 , 220-222 ) j German and Towns end (224 ) . 
ANOPLURA 
Haematopinidae 
Haematoplnus aslnl (L.), the horse sucking louse 
Derris, cube, or pyrethrum powders are reasonably effeotive.— 
U. S. Bureau of Entomology and Plant Quarantine ( 627 , p. 5). 
Haeoatoplnus eurysternus (Nits*)* the short-nosed cattle louse 
There are four species of cattle lice in the United States. This 
speoies, also Linognathus vltuli , and Solenopotes oapillatus belong to 
Anoplura, and Bovioola bovis , to Mallophaga* 
Demonstrations were conducted in Texas in 1938 to show that dip- 
ping in a mixture of 100 pounds of wettable sulfur, 10 pounds of cube 
(5 percent of rotenone), and 1,000 gallons of water would eliminate 
this pest* In 1939, 11,000 cattle were dipped, in 1940 more than 55,000, 
and by 1941 the praotice had spread to 48 counties. —Texas A. and M. 
College (585 ). 
Tests involving about 7,000 cattle showed that a sulfur -cube dip 
gave satisfactory oontrol of this louse in 1940. The maximum dura- 
tion of the egg stage was found to be much longer than the minimum 
duration of the nymphal stage, so that this louse cannot be eradicated 
by two treatments with the sulfur-cube dip no matter how they are 
spaced. In field tests in Texas all stages of this louse, except the 
eggs, were killed by dipping heavily infested cattle in the wettable 
sulfur-cube dip that had been used 21 days previously. This discovery 
that the tank need not be recharged for the second dipping will effect 
a considerable saving of labor as well as reduce by half the amount of 
insecticide formerly used.— U. S. Bureau of Entomology and Plant Quaran- 
tine (619 , p. 93; 623 , p. 95j 624 , p. 48). 
Spraying or dusting with sulfur-cube mixtures is recommended 
against oattle lice, including the short-nosed louse, but dipping is 
the better method. The following dip has so far proved efficient and 
safe as well as practical: No. 325 sieve wettable sulfur 100 pounds, 
cube or derris (5 percent of rotenone) 10 pounds, and water 1,000 
gallons. If only a few animals are to be treated they may be sprayed 
or dusted with the sulfur-cube mixture.— Baboock and Cushing (27) . 
