ANIMAL PARASITES. 



149 



rows. Sulphur ointment, although highly recommended, 

 is not nearly so efficacious. 



The harvest-mite, which is active during 

 Leptus July and August, is a red-colored larvae 



AuTUMNALis. of a Variety of TronibihidcB. The latter 



lives on grasses, bushes, and grain, and its 

 larvae alight on man as occasion offers. The red 

 papules and wheals which it produces are usually 



Fig. 24. — Leptus autumnalis: 

 enlarged. (Tyson, after Braun.) 



Fig. 25. — Female of 

 Ixodes ricinus, gorged 

 full, ventral and dorsal 

 surfaces, f. (After Pa- 

 genstecher.) 



situated on the ankles, but may also be found on other 

 parts of the body. 



The wood-jack or wood-tick is a fairly 



Ixodes large yellowish-brown tick, with a black 



Ricinus. head and a leathery body. It is common 



upon grasses and bushes, and from these 



places gets upon man and beasts. It is a blood- suck- 



