THE 
AMERICAN NATURALIST. 
VoL. x1v. — MARCH, 1880. — No. 3. 
THE PROBOSCIS OF THE HOUSE-FLY. 
BY PROF, G. MACLOSKIE, LL.D. 
1 Rat common house-fly of Europe (Musca domestica L.) prob- 
ably includes ‘the American as well as the old-world forms.’ 
Its proboscis has attracted much attention and been the subject of 
1, A-F.—A, right side view; B, dorsal view of proboscis of Musca dati 
hen. y semi-tubes of its Hb trachex ; D, two of the false achei with wrinkled 
membrane between; Æ, a tooth; A, arrangement of teeth between roots E 
tracheæ. In 4 and Z, y cine the tip; o, the operculum; /, the palps; 7 
fulcrum ; m, the mentum. R 
much misapprehension. I have recently been fortunate wee i 1 
to find out several important points about the mechanism me cise 
organ and the homologies of its parts. a oe 
- ? Harris had cast a doubt on this and given the American forms the title M. ae a : 
yia, in oe of his disgust at “these filthy dungbred creatures.” Prof. 
Mean ackard, at, Jr, has established their claim toa — in the 
eam i 
