THE HONEY BEE 



369' 



doors. The maggots then cause intense pain as they feed on the sur- 

 rounding flesh. 



The stable fly (Stomoxys calcitrans) looking something like a 

 housefly, except that it has a strong piercing beak, sucks blood from ani- 

 mals. It is supposed to be the animal which carries the germs of infan- 

 tile paralysis in addition to the injury it causes cattle. 



The smaller horn fly (Haematobia serrata) swarms about the bases 

 of the horns of cattle, biting constantly. 



ii. 



in. 



Fig. 241. 



I. Typhoid fever or house-fly (Mus'ca domes' tica :) a, Adult male; b., pro- 

 boscis and palpus of same ; c., terminal joints of antennse ; d., head of female ; e., 

 puparium ; /., anterior spiracle; all enlarged. (Howard and Marlatt, Bull. U. S.. 

 Dept. of Agriculture, 1896.) 



II. Metamorphosis of Saw-Fly. 



III. Tsetse fly, which causes a disease of cattle in Africa, enlarged. (L.. 

 O. Howard.) 



IV. Larvae of bot flies attached to the walls of the stomach of a horse. (After- 

 Osborn. ) 



LIFE HISTORY */ 



Flies (Fig. 241) breed about filth, and any decaying matter, though 

 they can breed and do in any wet, fermenting vegetable or animal mat- 

 ter. The maggots are hard to kill; they will live in pure kerosene for 

 over an hour, and even more than thirty minutes in alcohol. They have 



