12 



NEW YORK STATE MUSEUM 



to keep these insects out of houses on account of their small size. 

 Dr Howard has listed these forms as likely to be disease carriers. 

 These little insects ordinarily enter the house rarely unless 

 attracted by overripe or canned fruit. The latter should be her- 

 metically sealed, making it safe from injury, and stored in the 

 cellar or other place comparatively inaccessible to the flies, ^as 

 soon as convenient. These small flies can be easily destroyed with 

 fresh pyrethrum powder. . 



Fig. 2 Fruit fly: a, adult fly: b, antenna; c, base of tibia and first tarsal joint; 

 d, puparium, side view; s, same, dorsal view; f, larva; g, anal segment of same; a, d, e,f, 

 much enlarged; b. c, g, still more enlarged. (After Howard, U. S. Dep't Agric. Div. Ent> 

 Bui. 4. n. s. 1896) 



Malarial mosquito 1 



This insect has always been with us. It is only recently that 

 its connection with the spread of malaria has been established 

 beyond question, though there has long been a suspicion that some 

 mosquitos m'ght be responsible for this disease. 



Infect on by malaria. Medical men, best qualified to pass upon 

 the question, unhesitatingly affirm that certain mosquitos are 

 responsible for the dissemination of this malady. Malaria, like 

 some other diseases, is caused by a specific germ. It is peculiar in 

 that it has to pass through certain changes within the body of the 

 mosquito before it can develop successfully in the human 

 system. Moreover, malarial mosquitos are harmless until they 

 have become infected by biting some person suffering from 

 this disease. These germs may be carried by man in a latent con- 



'Anopheles maculipennis Meign. 



