Dipterous Lan'n- in I Ikduui Jlxcrcta. 55 



n (» r P 1). 



Animals which concern Man as causing bodily injury, some- 

 times death, to him, and in other cases disease, often of 

 a deadly character. 



Live Dipterous Larvas in Human Excreta and 

 Notes on Species producing Myiasis. 



Mr. J. W. I^riilge, of the Univei-sity, BinniiiLrliam, sent two larv£c 

 from the exci"eta of a woinau with the following letter, dated 

 Dec. 4th, lliOl: — 



I a.<k yon to i«lentify the sj^K-oiinens which I am sendini^ here- 

 with. Thcv were sent to me hy u doctor at Shrew.sbury who states that 

 they were pjussed per rectum hy w patient .'^ufferinf; from cancer. If yon 

 can give me any clue to their identitication I shall be gniteful. 



To this the following reply wa.s sent : — 



The lan;c von .send from the excreta of the woman sufTvring 

 from cancer are those of one of the Anthomyiidje and of the ^rentis 

 Homalomi/ia. Certain species of these dipteni are responsible for authentic 

 caBe« of intenial Myiasis. They are taken in with vegetable food and 

 retain their vitality and are sometimes piussed in the ficccs alive. They are 

 in uo way connected with cancer. 



Most of the cases of human Myiasis am due to the lar\'re 

 of Compsomtjia, Calliphora, S<nrojihi/'i, Houudomijut, Ochronujia, 

 Vcrmntobin and Anduncroijia. Myia.>»i.s may Ihj either (i) cutaneous 

 or (ii) internal. 



Homalomyin canicuhiris, Liun.. has l>een itiixtrteil by Ha;:en 

 (I'roc. IJost. Soc., X.H. XX. 107) a.s livinj^j in the larval stage in the 

 urethra of a i»atient. rn)bably, fays Xuttall, a case of pseudo- 

 porasitism. 



Tlie following other diptcrotis larva* have 1>een kno>vn to cause 

 external or cutaneous viyh' 



SarcophUa mognijica, .Schuier. \vh»« h delK>sits its eggs in wounds 

 on man and animals. 



