VI 



H. pluvialis. Common in woody lanes in England in the ' 

 summer. 



The third group {Cydorrhapha Schisophora) include the 

 muscinae, sarcophagidae, and oestridae. The last two groups 

 are not blood-suokers, but are included here for 'their 

 pathological interest ; also only some of the first group are 

 blood-sucking:. 



Fig- 93 



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). 



L. macellaria. The larva of this fly is the American ' screw 

 worm,' infesting the nasal fossae and frontal sinuses of man. 



(d) Genus Auchmeromyia. 



A. luteola. The larva is the blood-sucking floor maggot 

 of the Congo, etc. 



