I02 N. J. Agricultural Experiment Station, Bulletin 348 



the years when it is unknown, and both are present when an out- 

 break occurs. 



A. quadrimaculatus, the real malarial mosquito of New Jersey, 

 in its efforts to obtain food, draws the parasite, which causes the 

 disease, along with the blood of the malarious person whom it 

 chances to bite. The parasite undergoes certain growth stages in 

 the mosquito's body and finally reaches a stage of development 

 when it is injected into the feeding wound along with the mosquito's 

 saliva. This places the parasites in the blood stream where they 

 may attack the red blood corpuscles, initiating that series of changes 

 that brings chills and fever. 



Life Habits 



Like C. pipiens, this species passes the winter as an adult female 

 in cellars and other sheltered places. Breeding of this species be- 

 comes noticeable somewhat later than that of C pipiens. The eggs 

 are laid singly or loosely grouped on the surface of the water. From 

 fifty to seventy-five seems to be the usual number. In about 48 

 hours the wrigglers emerge and begin feeding. In from 7 to 10 

 days in mid-summer or twice that time in spring and fall, the wrig- 

 glers become fully grown and transform to pupae. In from i to 3: 

 days the adult emerges from the pupal skin. Breeding is as contin- 

 uous from spring until fall as the temperature and moisture condi- 

 tions will permit. 



This species seems to be quite as eager as C. pipiens in penetrating 

 human dwellings, and even more successful. According to Dr. 

 Smith^ although there were at least 100 C. pipiens for each Ano- 

 pheles developing in New Brunswick in 1903, there were quite as 

 many Anopheles as C. pipiens in his bedroom. 



Control of the Malarial Group 



The problem of control in the malaria group is much the same as 

 in the house-mosquito group except that present knowledge of the 

 flight range (according to Le Prince slightly over a mile) renders 

 the problem more local in nature and the greater facility with which 

 it uses wild and unpolluted, and brackish water makes necessary 

 close attention to streams and swamps within flight range. 



At this point the writer wishes to state that not enough study has 

 been giving to the flight habit of the Anopheline mosquitoes occuring 



"^Smith, J. B. 1904. N. J. Agr. Exp. Sta., Report on Mosquitoes, p. 159. 



