FIG. 3. FORMATION OF THE BLASTS OF H^EMOMENAS PR^ECOX 

 (ROSS) WITHIN THE BODY OF THE MOSQUITO ANOPHELES. 

 MAGNIFIED 2,OOO TIMES. AFTER ROSS AND FIELDING-OULD. 



No. i, The full-grown zygote dividing up into meres ; No. 2, an isolated 

 mere which has developed its filiform bodies or blasts ; No. 3, the 

 zygote crammed with blasts is bursting ; No. 4, the blasts are making 

 their way into the salivary gland of the mosquito a, through it into the 

 ossophagus b, and finally into the proboscis c. 



To face page 144. 



