speed and attacked all the live stock as well as man. Trombidium 

 holosericeum and other species cause great annoyance to sporting 

 dogs and sometimes to cats. Ziirn and Megnin report cases of dogs 

 and cats attacked by Dermanyssus gallinae, Redi. Sarcoptes scabiei, 

 Lat., attacks the dog and the cat ; a large species, probably that of 

 the pig, S. scabiei suis {S. squamifer, Fiirst.) has been found on a 

 dog by Cadiot and Raillet. The pathological conditions produced 

 by Demodex folliculorum canis (D. caninus, Tulk.) are fully discussed. 

 Sarcoptes cati, Herring, generally attacks old individuals among cats, 

 but the author thinks this is merely the result of greater exposure 

 to infection. S. cati may be transferred to the horse by cats sleeping 

 in the stable and is communicable to man. Treatment is difficult in 

 the cat, but a one per cent, solution of zinc chloride is said to be very 

 effective. Demodex folliculorum cati, which resembles that of the dog, 

 but is smaller, has been found in the external meatus of the ear. 



Grassi's filaria, Filaria {Acanthocheilonema) grassii, Noe, is conveyed 

 to dogs by Rhipicephalus sanguineus. More than fifty species of trypano- 

 somes have been described as attacking mammals, of which about 

 one-half are not pathogenic. Dogs may be inoculated with any form, 

 but are normally attacked by seven varieties which, if not promptly 

 treated, generally cause death, viz., T. evansi, T. annamense, T. togo- 

 lense, T. brucei, T. dimorpJwn, T. congolense and T. pecaudi. Surra 

 has attacked sporting dogs imported from England into Bombay, 

 Burma and the Punjab, and during the epidemic of surra in Mauritius 

 (1902-04) several dogs died of the disease. Leishmaniasis is common 

 in dogs in North Africa and is transmissible to man by the dog flea, 

 Ctenocephalus canis. Visentini reported that the destruction of starving 

 dogs in the Lipari Islands acted as a prophylactic against the spread 

 of the disease to man. Piroplasmosis (babesiasis) in dogs is known 

 in all tropical countries and in some others, and imported dogs are 

 peculiarly liable to be attacked. The disease is conveyed in France 

 by Dermacentor reticulatus and possibly by Ixodes ricinus ; in South 

 Airica by Haemaphysalis leachi ; in India by Rhipicephalus sanguineus. 

 Another form, Piroplasma gibsoni, Patt., of which the jackal is probably 

 the reservoir, is carried by a tick closely related to R. simus. Haemo- 

 gregarina canis, which does not seriously affect the dog's health, is 

 said by Christophers to be carried by R. sanguineus. Dirofilaria 

 immitis, Leid., is very widespread, especially in China and the East. 

 No breed of dog is immune and the larger dogs are specially attacked ; 

 the disease is rare in small house dogs, at least in Europe. Grassi 

 and Noe have shown that Anopheles macidipennis, Meig., is the inter- 

 mediate host of D. immitis, in which it develops in the Malpighian 

 tubules. Dirofilaria repens, RailUet and Henry, lives in the subcu- 

 taneous connective tissues of the dog, and the embryos in the blood. 

 The animals do not appear to be seriously affected as a rule, but Guby 

 and Delafond have observed epileptiform attacks in dogs infested with 

 this parasite. Stegomyia fasciata, F., is the intermediate host, and the 

 development of the embryo is identical with that of D.imynitis in A. 

 maculipennis ; it is possible that the latter insect also serves as an 

 intermediate host. The principal parasites which attack the ears of 

 dogs and cats are the mites, Chorioptes cynotis canis and C cynotis felis, 

 which produce acute tympanitis. Ferrets are liable to the attacks of 

 Sarcoptes scabiei furonis, RailL, which differs in some characters from S. 



