30 310SQU1T0ES 



quitoes, in orelcr to avoid their inittitiiij;- puiu-turos and 

 to produce tlio condition of general comfort which the ab- 

 sence of mosquitoes briug-s, no possible spot where water 

 can accuniuhite shouhl be overlooked. The smallest i)os- 

 sible collections of sta<,'-nant rain-water become breeding" 

 places and may swarm with larvte. Mr. E. E, Austin, of the 

 Liverpool Troi)ical School Expedition, has seen in A^'est 

 Africa that discarded bottles, Swiss milk and sardine tins, 

 and cocoanut husks, frequently swarm with larva\ while 

 the water which accumulates in disused calabashes and 

 other vessels lying- about outside of houses is used for 

 breeding. Mr. 11. H. Pettit (13ul. 18G, Mich. Agric. Col- 

 lege Ex}). Sta.), in a report on " The Insects of the Upper 

 Peninsula of Michigan," Avrites as follows: "Land that is 

 being cleared furnishes an ideal place for them to breed. 

 Holes made in removing stumps and into Avliich water 

 has settled are often fairly alive with wrigglers." He 

 collected a large number of larva> and pupje from a hole 

 which would hold only a small qiumtity of water, and 

 bred adults from them. 



AVo have mentioned above that Dr. Smith has found 

 them breeding- in the pitchers of the pitcher plant, and 

 Dr. Henry Strahau, in the Jnunail of Tropical Medicine 

 for August, 1900, shows that mosquitoes breed in Lagos, 

 West Africa, in similar plants. In the summer of 1900, 

 Mr. W. J. Matheson, of Lloyd's Neck, Long Island, after 

 a most successful work, which iucludi'd the drainage or 

 treatment with kerosene of every possible ascertained 

 breeding-i)lace within a half mile or more of his house, 

 in October, on g"oiug into his greenhouse, noticed three or 



