124 



2. Nematodes in the thorax or abdominal 

 cavity. 



3. Sporozoa. (a) Sausage- shaped bodies in 

 masses, sometimes in close connexion with the 

 salivary glands (Fig. 40). 



(b) Octosporozoa, consisting of eight small 

 sausage-shaped bodies in small cysts, enormous 

 numbers of which replace the yelk of the ovum 

 (Fig. 40). 



(c) Flagellate bodies in the rectum and hind- 

 gut, frequently in enormous numbers, and shewing, 

 when stained, large numbers of developmental 

 forms {Vide under T. noctiiae). 



(d) Gregarines. Occasionally on the outside 

 of the stomach or encysted in the malpighian tubes. 

 In the larvae, the worm-like gregarine will be 

 found actively motile in the malpighian tubules. 



4. The developing embryos of filariae. These 

 are seen as sausage-shaped bodies with a terminal 

 spike in the dissection of the salivary glands. In 

 sections of mosquitoes they are seen in the muscles, 

 especially in those of the thorax. 



5. The developed embryos of filariae in the 

 labium or about the base of the neck. 



6. In the oesophageal diverticula masses of 

 micro-organisms and sporozoa {Nosema) ? wdll be 

 found. 



To Cut Sections of Mosquitoes 



I. Kill some Anophelines by tobacco smoke or 

 chloroform, or allow them to fall directly into 

 absolute alcohol, by pouring a few drops into the 

 tube containing them. Avoid, if possible, mosqui- 

 toes containing blood, as the blood becomes very 

 hard. 



