39 2 
H. pluvialis. Common in woody lanes in England 
in the summer. 
The third group ( Cyclorrhapha Schizophora) in¬ 
clude the Muscinae , Sarcophagidae , 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. 
i. Muscinae = Muscidae (restricted). 
Antennae dependent 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 Calliphora. —Blow flies or blue bottles 
(not blood-sucking). 
(c) Genus Lucilia. —Green bottles (not blood¬ 
sucking). 
