300 



ENTOMOLOGY 

 FIG. 269. 



Life history of malaria parasite, Plasmodium pracox. i, sporozoite, introduced by 

 mosquito into human blood; the sporozoite becomes a schizont. 2, young schizont, 

 which enters a red blood corpuscle, j, young schizont in a red blood corpuscle. 4, 

 full-grown schizont, containing numerous granules of melanin. 5, nuclear division 

 preparatory to sporulation. 6, spores, or merozoites, derived from a single mother- 

 cell. 7, young macrogamete (female), derived from a merozoite and situated in a 

 red blood corpuscle. 70, young microgametoblast (male), derived from a merozoite. 



8, full-grown macrogamete. 8a, full-grown microgametoblast. In stages 8 and 8a the 

 parasite is taken into the stomach of a mosquito; or else remains in the human blood. 



9, mature macrogamete, capable of fertilization; the round black extruded object may 

 probably be termed a " polar body." pa, mature microgametoblast, preparatory to 



