INFECTION OF INSECT WOUNDS 211 



Distingnishing features. 



" From Miisca domestica L., M. pattoni can be distinguished, 

 inter alia, by its usually larger size, stouter habit of body, much 

 narrower front in the male, the greater breadth of the sides of the 

 front in the female, and the more sharply defined median stripe 

 in the abdomen in both sexes. The fact that the first segment 

 of the abdomen is in both sexes for the most part ochraceous- 

 bufif or buff, instead of entirely or for the most part black or 

 bronze-black, will serve to distinguish Musca pattoni from 

 M. corvina Fabr., and other species closely allied thereto. From 

 Musca nebiilo Fabr. — which, according to Captain Patton, is ' the 

 common Mnsca of Madras, breeds in horse dung and other 

 refuse, particularly in night soil, and has a reddish-brown pupa ' 

 — M, pattoni differs, inter alia, in its much larger size, in the 

 front of the male being only half or less than half as wide, and 

 in the presence of the clove-brown mark on the apex of the 

 fourth abdominal segment. In M. nebnlo the fourth segment of 

 the abdomen, or at least its apex, is entirely pale." 



CHAPTER XXII 



MYIASIS 



The term, myiasis, signifies the presence of dipterous larvaj in 

 the living body, whether of man or animals, as well as the 

 disorders, whether accompanied or not by the destruction of 

 tissue, caused thereby. Though not strictly coming within this 

 definition the sucking of blood by larvae through punctures of 

 the skin, which they themselves produce, may be included for 

 the sake of convenience in classification. 



Myiasis in man may be produced by dipterous larvae 



{A') Sucking blood through punctures in the skin 



Aiichmeromyia luteola. 

 14 — 2 



