rubbed in with the hands. This treatment should be repeated daily 

 for three days and then the horse should be turned out to pasture as 

 described. 



Brown (W. G,)- The 'K.SLggot-F]y, ^Queensland Agrlc. JJ., Brisbane, 

 \di, no. 2, February 1917, p. 85, [Received 11th April 1917.] 



The author urges the necessity for destroying sheep-maggot flies 

 instead of seeking palliatives for the infested sheep. As the grass in 

 the paddocks, as well as shrubs and weeds, are frequently swarming 

 with flies, it is suggested that a poison gas should be tried which is 

 heavier than air and which would flow over the country and destroy 

 the flies, the sheep having been previously removed to higher ground. 

 This method is said to have been used with success to destroy prickly- 

 pear. 



Regulations of the Montana State Board of Entomology, — 2nd Biennial 

 Repl. Montana State Bd. Entom. 1915-1916, Bozeman, loth 

 December 1916, pp. 9-12. [Received 17th April 1917.] 



These regulations are the same as those given in a former report 

 [see this Review, Ser. B, iii, p. 60] with the exception of one section 

 which prohibits domestic animals, including cows, horses, asses, mules, 

 sheep, goats and pigs, from entering any tick-control district as desig- 

 nated by the Board for grazmg or feeding purposes between 1st Feb- 

 ruary and the 15th July of each year, unless accompanied by a permit 

 issued by the Secretary of the State Board of Entomology or a duly 

 authorised representative of the United States Bureau of Entomology 

 or the United States Public Health Service. 



King (W. V.). Report on the Investigation and Control of the Rocky 

 Mountain Spotted-fever Tick in Montana during 1915-1916. — 



2nd Bienn. Bept. Montana State Bd. Entom. 1916-1916, Helena, 

 15th December 1916, pp. 13-23. [Received 17th April 1917.] 



Experimental control operations against the spotted fever tick 

 {Dermacentor vemistus) were continued during the spring seasons of 

 1915-1916 on the same lines as those in the previous year [see this 

 Review, Ser. B, iii, p. 60]. 



The number of dipping vats has been increased and the dipping 

 solution now used is composed of sodium arsenite and a weak kerosene 

 emulsion. These are prepared by dissolving a given amount of sodium 

 arsenite in 50 U.S. gals, of water by boiling. The arsenite used 

 should contain about 70 per cent, arsenic and the resultant solution 

 from "195 to "200 per cent, arsenic in the arsenious form. This solution 

 is added to a vat half full of water and 10 U.S. gals, of kerosene are 

 then emulsified and mixed with it and the vat filled up with water. 



The capacity of the vat is computed by the prismoidal formula 

 (see U.S. Dept. Agric. Farmers, Bull. 498, p. .36). The kerosene 

 emulsion is prepared by dissolving 12 lb. potassium soap in 2 U.S. 

 gals, warm Avater and, when cool, kerosene is added in the proportion 

 of 3 U.S. gals, to 2 quarts of soap solution. The emulsion is formed 

 by being well sprayed back into itself in a hand-spray pump and, when 

 of a thick creamy consistency, is diluted with water in a separate 



