veterijStart medicine. 83 



were infested, at Colorado Springs 30 out of 91, and at Bancroft, Nebr., 5 out 

 of 19. Of 137 pupfe examined 23. or 17 per cent, were found to be infested. 

 Eight was the largest number of worms found in a single fly. The author's 

 observations show that tl^ worms may survive in flies for at least 2 days after 

 the death of their host. " The embryos are active and motile when alive. 

 Undoubtedly they pass out of the body of the horse in the feces. Whether they 

 undergo further development before entering fly larvae has not been determined, 

 nor has it been determined whether they forcibly enter the intermediate host or 

 whether they are passively swallowed." Six larval stages are described. 



The adult H. muscce is shown to be very similar to Spiroptera microstoma, 

 known since 1SG6 as a parasite occurring in the stomach of the horse, but is a 

 distinctly different species. Since the 2 species are congeneric the latter takes 

 the name H. microstoma. The author considers it probable that H. microstoma 

 has a life history similar to that of H. muscce and that the form from Stomx>xys 

 calcitrans, called Filaria stomoxeos is the larval stage of H. microstoma. 



A list of the literature relating to the subject, consisting of 14 titles, is ap- 

 pended. 



[Equine piroplasniosis in the Canal Zone] {Rpt. Dept. Sanit. Isthmian 

 Canal Com., 1913, Mar., p. 43). — A report of the occurrence of a fatal primary 

 case of piroplasmosis due to Piroplasma caballi in a horse in the Aucon corral. 

 The tropical horse tick [Dermacentor nitens) was taken from the infected horse 

 and is thought to be the carrier of the disease. 



The fourth season's report upon the value of the ventricle stripping 

 operation for roaring, F. Hobday (Vet. Jour., 69 (1913), No. Ifolf, pp. 159- 

 170). — The author concludes that this operation will in fully 75 per cent of 

 the cases convert a horse required for galloping, such as a hunter, from a 

 useless to a useful animal ; where carriage and cart horses are concerned, or 

 animals used for comparatively slow work, the percentage will be fully 90 

 or even 9.5. 



The frequence of trichinosis in dogs and cats, S. H.jortlund (Maanedskr. 

 Dyrlwgcr, 24 (1912), No. 16, pp. ^74-^83; abs. in Vet. Rec, 25 (1913), No. 1281, 

 p. 1/53). — Of 500 dogs and 100 cats from Copenhagen and Frederiksberg ex- 

 amined during the period from January to April, 1912, 2 dogs, or 0.4 per cent, 

 and 2 cats, or 2 per cent, were found to be affected with trichinosis. The con- 

 clusions drawn from the investigations reported ai-e as follows : 



"All investigations carried out hitherto show that dogs and cats are much 

 more frequently trichinous than are pigs which have been brought up in the 

 same neighborhood. Cats again are more frequently trichinous than dogs. The 

 present researches show that the dogs and cats of Copenhagen are often 

 trichinous ; but they also show that trichinosis in dogs and cats is on the de- 

 cline. This decline is probably due to the inspection of pigs' flesh for trichinosis. 

 It may therefore be expected that if in the future all pigs in Denmark are sub- 

 mitted to compulsory inspection for trichinosis, the disease in dogs and cats 

 will diminish still further. Assuming that dogs and cats are infected exclu- 

 sively or mainly by the ingestion of trichinous pigs' flesh, it follows that the 

 systematic examination of dogs and cats may be used as a method for observ- 

 ing the effect of the trichinosis inspection of pigs. The bodies of dead dogs 

 and cats, on account of the frequence of trichinosis in them, should always be 

 disposed of in such a way as to insure their harmlessness." 



On a hepatic blastomycosis of geese, A. Maetin and A. Daixle (Rev. Vet. 

 [Toulouse], 37 (1912), No. 3. pp. 129-134; abs. in Vet. Rec., 25 (1913), No. 1280. 

 p. 435). — The parasite found to be the cause of this infection is described as 

 Cryptococcus anseris. 



