CONTROL OF HOUSEHOLD INSECTS 15 



The malarial mosquito is widely distributed in the North and 

 there is always a chance of an outbreak following the appearance of 

 parties suffering from malaria or having the parasite in their blood, 

 as for example, Italians. The advent of either in a neighborhood 

 should be preceded if possible by extraordinary activity in draining 

 or treating breeding places in order to destroy as many of the 

 insects as possible and thus reduce the danger of infection. Methods 

 of value in controlling common mosquitos will be equally service- 

 able in checking: this disease carrier. 



Yellow fever mosquito 1 



This, though a southern species, is of interest owing to its great 

 economic importance. It is a dark brown form, marked with 

 strongly contrasting silvery white, and is frequently designated as 

 the day mosquito in the South. 



Yellow fever carrier. This insect appears to be the only method 

 by which yellow fever may be conveyed from one person to another. 

 As in the case of the malarial mosquito, the yellow fever mosquito 

 is harmless until it has become inoculated with the germs by biting 

 a yellow fever patient, and even then some 12 days must elapse 

 before it can convey the infection. As a result of the recent 

 discoveries relating to this insect, the control of a yellow fever 

 outbreak means a strenuous, well sustained campaign against this 

 insect, supplemented by the exercise of special care to prevent 

 mosquitos gaining access to yellow fever patients. 



Habits and control. The yellow fever mosquito appears to have 

 in the South much the same habits as our house mosquito in 

 the Xorth. It displays a marked preference for the water in 

 cisterns, tanks and similar places; consequently measures of value 

 in reducing the house mosquito will prove equally serviceable in 

 controlling this much more dangerous southern species. 



ANNOYING FORMS 



Cluster fly 



This interesting species 2 has received its popular name because 

 of the large clusters occasionally found in, autumn in houses. It 

 is easily distinguished from the rather closely related house fly by 

 the black thorax covered rather thickly with tawny hairs frequently 



'S t e g o m y i a calopus Meign. 

 J P o 1 1 e n i a rudis Fabr. 



