To the Editor:
—In the article "Prevention is Greater than Cure," in the section headed "Mosquito Pest" (The Journal, Oct. 17, 1914, p. 1392) the categorical statement is made: "Mosquitoes, unless wind-blown, travel only a few hundred yards from their source of breeding." This is incorrect. Numerous studies by many observers have conclusively shown that many species, including such proved disease carriers as A. albimanus, C. fatigans, and A. argyritarsis, travel very considerably more than "a few hundred yards," unless by "a few hundred yards" the author intends to cover 1,000 to 2,000 yards. Also, at least certain species, and among these the A. albimanus, travel by preference against a mild breeze, one not exceeding a velocity of 4 miles per hour. The supposition of mosquitoes being "blown by wind" is open to serious doubt. It is more than likely that they travel during the calm immediately following a blow.