s'2 



MALARIA 



and Bquirrels, were obtained through t h<- courtesy of the I . S. Public 

 Health Service of Washington. A habitat group -how- a typical 

 family of ground squirrels on a rocky hillside in central California, 

 during the breeding season in May. Preventive measures used against 

 the plague arc illusl rated by models of a farm with buildings rat-proofed, 

 of a rat-killing squad, equipped for work in San Francisco, of a ship at 

 dock with rat-guards to prevent the access of rats to the Bhore, and by 

 - pecimens of various types of rat trap-. 



THE FLEA 



One of the enlarged models made by the late Ignaz Matausch from his original 

 studies and now shown in a case devoted to Insect Carriers of Disease, in the Hall 

 of Public Health. 



In a window case are shown various stages of the common mosquito, 

 Culi.w as well as of Anopheles, the carrier of malaria, and Aides, which 

 is responsible for the spread of yellow fever. In the same case are 

 specimens of other insect carriers, such as the flea , the bedbug and the louse. 



A wall case devoted to the natural history of the mosquito illustrates 

 the world distribution and seasonal prevalence of malaria and yellow- 

 Malaria and fever in relation to the habits of their mosquito hosts, the 

 Yellow Fever breeding-places of mosquitoes, the life history (shown by 

 specimens) and the money cost of malaria to the United States. Here 

 are also shown some of the practical methods of control by ditching, 

 oiling, stocking with fish, and encouraging enemies such as the bat, 

 lute cures, and repellents and finally the practical results in the reduction 

 of malaria which have been obtained in Italy. 



A second mosquito case contains a series of small-scale models, 

 attractively worked out by Otto Block, illustrating some of the methods 





