. Animal parasites and parasitic diseases . Domestic animals; Veterinary medicine. 28 PARASITOLOGY. History.—Found in common with the Gastrophihis Equi in North America and Europe. Description.—Not so large as the Gastrophilus Equi. The thorax is covered with olive-gray hair ; a black band is found in the middle. The abdomen is white in front, black in its median part, and orange red at the posterior end. Life Cycle.—The eggs are oval in shape and black in color. The larvae are taken into the mouth and swallowed, and then, by means of two booklets, at- tach themselves to the mucous membrane of
. Animal parasites and parasitic diseases . Domestic animals; Veterinary medicine. 28 PARASITOLOGY. History.—Found in common with the Gastrophihis Equi in North America and Europe. Description.—Not so large as the Gastrophilus Equi. The thorax is covered with olive-gray hair ; a black band is found in the middle. The abdomen is white in front, black in its median part, and orange red at the posterior end. Life Cycle.—The eggs are oval in shape and black in color. The larvae are taken into the mouth and swallowed, and then, by means of two booklets, at- tach themselves to the mucous membrane of the digestive tract. They are found mostly in the right and left sacks of the stomach. They may loosen their hold and become attached at another point. They often become attached to the rectum, causing itching, and rubbing of the tail. The pupal stage lasts from four to six weeks, and is passed in the ground. Animal Attacked.—The horse. Parts Infested.—Stomach and intestines. Oestrus Ovis (Oestrus—gad-fly; ovis—sheep). Synonyms.—Cephalemyia ovis (cephalo — head, myia—fly); sheep-bot; grub; head-maggot; sheep gad-fly. History.—Found in Ameri- ca, Europe, Asia, Africa and Australia. Description. — Small, yel- , . - ,. Fig. 5—Oestrus Ovis Larva, lowish gray fly, shghtly larger a, Side view. than the house-fly. Body b, Posterior view. covered with short fine hair. The abdomen is orna- mented with five rings; under side of head is Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kaupp, Benjamin Franklyn, 1874-. Chicago : A. Eger
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