ORDER DIPTERA. 



Ill' 



when covered with perspiration, it anbei probos 



extends it, and the broad knob-like end di> two 



Flo. 187. — Head and proboscis of the blow-fly. .. eye; c, epicranium; bp, basi- 

 proboscis; i>. maxillary palpus: pr, chitinous ridges uniting with ih>- rudimen- 

 tary maxilla; li>, lower labial plate; mp, medi-, (//>. disti-pn Alter 

 Kraepelin. 



flat, muscnlar leaves (F . B, I), which thus form a 



broad sucker-like Burface, with which the fly laps up 



Fig 188 Proboscis of the house-fly 4. right-side vie w ; P.Tiew of the same from 



■ • tracheae meni ..f t.-. tli 



between roots of false tracheae: />. two of the i - with wrii 



membrane between. In A and B: I, labellura culum; i •.ful- 

 crum; m. meiitiiiu. Magnified. After McCloskie. 



liquid Bweets, or any matter which seems good to the fly's 

 mind. 



The two flaps at the end of the prol re supporl 



upon a framework of strong but delicate rods which act as 

 a set of springs to open and shut the broad fl ips. The in- 

 side of this broad, fleshy expansion is r.":_ ; i. like a rasp, 

 and. as Newport states, •• is easily em] by the h - 



