392 



H. fluvialis. Common in woody lanes in England 

 in the summer. 



The third group (Cyclorrha-pha Scbizofbora) in- 

 clude the Muscinae, Sarcopbagidae, and Oestridae. The 

 last two groups are not blood-suckers, but are included 

 here for their pathological interest ; also only some of 

 the first group are blood-sucking. 



Arilf* 



I . Muscinae = Muscidae (restricted) . 



Antennae de-pendent in front of head. They have 

 three segments. The third segment is flattened and 

 pod-like in shape, with an arista plumose generally to 

 the tip. Hind body devoid of stiff bristles. 



(a) Genus Musca. House flies (not blood-suckers). 



(b) Genus Callifhora. Blow flies or blue bottles 

 (not blood-sucking). 



(c) Genus Lucilia. Green bottles (not blood- 

 sucking). 



