The Mosquitoes of New Jersey 



lOI 



The total number of cases of malaria in the state as a whole is 

 not large— 484 cases in 191 2 and 614 cases in 191 3— but when we 

 consider the distribution of these cases (366 in 1912 and 331 in 

 1913, in one county), the number is far too large. We should have 



,-,.f Anopheles and Malaria: a, larva; b, pupa; c, adult; d, the blast 

 intioduced mto the blood by the mosquito; e to j, stages through 

 which the Plasmodium passes in the red blood-corpuscles; fc. the 

 spores which enter new blood-corpuscles ; I, in, the microgamete • 

 wif?; i niacrogamete; jj, flagellae forming; q. union of a flagellum 

 \Mth a macrogamete ; r, fusion of nuclei; s, the vermicule ; f to v. 

 toimation of the zygote in the mosquito stomach; the fullv devel- 

 oped zygote, y, rupturing to produce blasts. 



Fig. 62. The Malarial Parasite and its life cycle. (After John B. Smith). 



no new cases among persons living constantly in the state. In at 

 least one district in New Jersey, malaria appears as regularly as' the 

 season. In other localities where it occurs at all it comes at intervals 

 only. Either the malarious subject or the mosquito is absent during 



