LIST OF PLATES 



The House or Typhoid Fly, ilusca domcstica. (ireatly enlarged. _ 



(Howard and Pierce, Photo by Dovener) frontispiece 



PAGE 



'"'T Screw Worms and Blow Flies. (Howard axd Pierce, Photos by Dove- ^^^ 



ner ) • 



Fig. 1. The blue bottle fly, Calliphora vomifona. 

 " 2. The green bottle fly, Lucilia coesar. 

 " 3. The American screw worm, Chrysomya macellaria. 

 " 4. The black blow fly, Phormia regina. 

 II. Eggs of the American Screw Worm, Chry.wmya macellaria. On Meat. ^^^ 

 (Bisiiopp) 



III. Flies with Dangerous Habits. (Howard and Pierce, Photos by Dove- ^^^ 



ner) 



Fig. 1. A flesh fly, Sarcophaga sarracema. 

 " 2*. The non-biting stable fly, Muscina stabulans. 

 " 3. The lesser house fly, Fannia canicularis. 

 " 4. The brilliant green fly, Pseudopyrellia cornicina. 



IV. Screw Worm Injury to a Yearling Calf. (Bishopp) 150 



V Manure Box with Flytrap Attached. (Bishopp) 155 



VI. Manure Spreader. (Bishopp) 



YII. Road Drag in Use Scraping M.^nure in a Cow Lot on a Tennessee Farm. ^^^ 



(Bishopp) 



VIII Undesirable Conditions Which Are Overcome by Use of the Maggot 

 Tr^p a manure pile covering a large area and having httle depth Illus- 

 trating the conditions which favor the greatest loss of nitrogen, and at the 

 same time offer the best breeding ground for flies. (Hutchison) . . . 1o9 



IX. Carcass Partly Destroyed by Larv.e of the American Screw Worm ^^^ 



Fly, Chrysomya macellaria. (Bishopp) 



183 



X. Horse Bot Flies. (Dove) ••,••••, 



Fig. 1. Gastrophilus intestinalis, the common bot. 

 " 2. Gastrophilus hmmorrhoidalis, the nose fly. 



XI Phases of the Life Cycle of Bot Flies. (Bishopp) 18* 



Fig 1 Empty eggs of the cattle bot, H?/;;orffrm« /uimfa. 



'' " 2! Eggs of the common horse bot, Gastrophilus intestuialis. 



" 3! Full grown larva of Uypoderma lineata. 



" 4. Empty puparium of //ypo«?erma /mea/a. 



" 5. Empty pupanumoi Gastrophilus riitestinal IS. 

 XII. Method of Attack by the Common Horse Bot, Gastrophilus intestinalis. ^^_ 



(Bishopp) • • •, 



Fis 1. Eggs on horse's legs. , , ■ 1 ■ j i ,. 



'• 2. Larvae attached to walls of stomach, showing lesions caused \n 

 removed bots in center. 



XIII. Method of Attack by the Cattle Bot, or Heel Fly, Hypodemu. ^^^ 



lineata. (Bishopp) . . . 



Fiff 1 Flv ovipositing on cow s leg. 

 '' 2. Portion of cow's back showing larva-, empty holes, and pus exudate. 

 " 3. Heavily infested cow. 



XIV. Trench Prepared for Burning Carcass. (Bishopp) ^01 



XXV 



