212 



MYIASIS 



(B) Deposited in natural cavities of the bod}' Chrysoniyia. 



L ncilia. 

 Sarcophaga. 

 Calliphora. 

 CEstrus. 



Chrysoviyia. 

 Lit cilia. 

 SarcopJiaga. 

 Calliphora. 



Coniylobia. 

 Dermatobia. 

 Betigalia (?). 

 Hypodenna. 



Fannia. 



Miisca. 



Eristalis. 



Syrp/ins. 



Gastrophilus. 



In the above list only the more common genera producing 

 myiasis are mentioned. In England type E is fairly common, 

 and types B and 6" are occasionally observed. 



(O Deposited in neglected wounds 



{D) Living in subcutaneous tissue 



(£") Passing through the alimentary canal 



A. Bloodsucking lai'Viv. 



The only dipterous larva, known to suck blood, is the 

 ' Congo floor maggot,' which is widely distributed in both 

 tropical and sub-tropical Africa. Lelean (l. 1904) described 

 both the fly {Auchinerojnyia lutcola) and the maggot, and shortly 

 afterwards Dutton, Todd and Christy (1904) gave a more 

 detailed account of the life-history of this insect, and pointed out 

 that in its larval stage it is a keen blood-sucker : — " When visiting 

 a native village, we had the opportunity of seeing the natives 

 collect these blood-suckers by digging with the point of a knife 

 or scraping with a sharpened stick in the dust-filled cracks and 

 crevices of the mud floors of their huts. We were soon able to 

 find them ourselves as easily as the natives, and unearthed 



