440 



whitewashinj? with quick lime with or without chloride of lime will pre- 

 vent future attacks. The skiu may still require bland ointments or 

 lotions, as for congestion. 



Parasite: Larva of a Tromhidium — Lepfns AmeHcanus— Harvest 

 Bug . misnamed Jigger {Chigoe). Malady: Autumn mange. — This par- 

 asite is a brick-red acarus, visible to the naked eye on a dark ground, 

 and living on green vegetation in many localities. It attacks man, 

 and the horse, ox, dog, etc., burrowing under the skin and giving rise to 

 small papules and intolerable irritation. This continues for two or three 

 days only if no fresh acari are received, but will last until cold weather 

 sets in if a fresh colony is received every day. Horses at pasture suffer 

 mainly on the lower part of the face. If kept indoors the disease will 

 disappear, or if left at pasture a weak tar water or solutiou of tobacco 

 ma^' be applied to the face. 



Parasites: Gamarus Pteropioides and Chegletaes live in musty fod- 

 ders and are found on the horse. 



TICKS. 



The wood tick is familiar to inhabitants of uncultivated lands, and 

 proves a troublesome parasite to man and beast alive. It lives on 

 bushes, and only attaches itself to the mammal to secure a feast of 

 blood, for when gorged it drops off to sleep off its debauch on the soil. 

 The tick produces great irritation by boring into the skin with its armed 

 proboscis. If pulled out the head and thorax are often left in the skin. 

 They may be covered with oil to shut out the air from their breathing 

 pores, or by touching them with a hot penknife they will be impelled 

 to let go. If extracted by the hand they should be turned to the left 

 like a screw. It is needless to particularize the several species, as all 

 can be treated alike. 



GRUBS IN SKIN. 



P/VRASTTE: Hypoderma Silenus. Malady: Larva (Grubs) under the 

 skin. — This fly deposits its embryo on or in the skin of the horse, as its 

 congener {Eijpoderma bonis) does in the ox, and the resulting larvae 

 pass the winter in little rounded sacks beneath the integument, fur- 

 nished with a central opening, through which the mature larva escapes 

 in early summer and develops into a fly. In districts where they exist 

 the grubs should be pressed out of the skin and destroyed in the course 

 of the winter. 



LARVA (GRUBS) ON THE SKIN — FLY-BLOW. 



The following flies, among others, deposit their eggs on open sores 

 or on wet filthy parts of the skin, where their larvse or grubs give rise 

 to serious trouble : Lucilia Ccesar (blue bottle). Lucilid hominivorax 

 (screw-worm fly), ATusca vomitoria (meat fly), and Sarcophaga carnaria 



