ENTOMOLOGY 
: Fic. 2609. 
= 
NY 
4 
Life history of malaria parasite, Plasmodium precox. 1, sporozoite, introduced by 
mosquito into human blood; the sporozoite becomes a schizont. 2, young schizont, 
which enters a red blood corpuscle. 3, 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. 7a, 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.” oa, mature microgametoblast, preparatory to 
