75 



solutions to hatch in large numbers within a few minutes. The most 

 reasonable explanation of these phenomena would seem to be the 

 stimulus by smell, or some closely analagous sensation of the larva, 

 followed by active use of its egg-breakmg appliance. 



Salm (A. J.). Description du Ceratopog&n blancJiardi, n. sp. [A 

 Description of Ceratopogon blandiardi, sp. n.]—Bull. Soc. Zool. 

 France, Paris, xU, no. 8-10, 25th February 1917, pp. 106-108, 1 fig. 



Ceratopogon blanchardi, sp. n., from Java, is described from specimens 

 captured at light in 1914 and 1915. 



Pointers on the Horn Fly.— Ji. Jamaica Agric. Soc, Kingston, xxi, 

 no. 2, February 1917, pp. 46-48, 1 fig. [Received 11th April 

 1917.] 



The horn-fly [Lyperosia irritans] has been introduced into the West 

 Indies from Europe and, under tropical conditions, with no winter to 

 check its increase, it becomes of great economic importance, attackmg 

 cattle m dense clouds. The eggs are laid on cow-dung, in which the 

 larvae live, the pupal stage being passed in the ground. The adults are 

 probably instrumental in the transmission of stock diseases. Control 

 measures suggested are spraying the cattle with kerosene emulsion, 

 which, however, is not lasting in its effects ; netting the adult flies by 

 hand nets; and spreading manure over the fields in the wet season to 

 produce rapid drying. 



Ritchie (A. H.). Hog Lice.— JL Jamaica Agric. Soc, Kingston, xxi, 

 no. 3, March 1917, pp. 91-92. 



The measures for the destruction of lice on pigs here suggested 

 are :— Kerosene emulsion, 10 per cent. ; Florida citrus spray, one 

 part to five parts water ; 1 lb. rancid grease, lard or butter, m which 

 i pint of kerosene is mixed until a creamy mass is formed ; tobacco 

 decoctions ; or emulsion of Jeyes' soap and hot water. This treatment 

 should be repeated after about 10 days. 



Another plan recommended is to drive posts into the ground m the 

 sty and wrap them round with burlap saturated with a thick crude 

 oil. The pigs will rub against these posts and smear the affected 

 parts with the oil. Wherever it is possible to have the sty of concrete, 

 this is far the best method of keeping the animals free from pests. 

 No rough timber or posts with loose bark, seams or cracks, where lice 

 can lodge, should be used, and the sty should be whitewashed, one 

 pint of crude carbolic being added to each 4 gals, of wash. 



HowAED (L. 0.) Hydrocyanic-acid Gas against Household Insects.— 



U.S. Dept. Agric, Washington, D.C., Farmers' Bull. no. 699, 5th 

 April 1916, 8 pp. [Received 12th April 1917.] 



This bulletin gives popular instructions in the safe and effective 

 use of hydrocyanic acid gas against household pests, such as bed-bugs, 

 fleas, cockroaches, ants, clothes-moths and carpet-beetles. 



As this gas is a deadly poison, the fumigation process must not be 

 undertaken until it is thoroughly understood in every particular. 



iC37l) ^'^ 



