ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 619 



Plasmodium praecox.* — P. Argutinsky has been able to study in 

 particular the pitting (Tiipfelung) of the margin of the erythrocytes 

 bearing the " half-moon " stages of the Tropica and Tertiana parasites. 



Parasite of a Central South American Horse Disease.! — 0. 

 Voges has found that a distinct form of Trypanosoma (T. equina sp. n.) 

 is the cause of Mai de Caderas, a serious fever-disease associated with 

 hemoglobinuria, hematuria, rapid and great oscillations of temperature, 

 and so on. It only occurs in swampy regions and may be kept from 

 :spreading by shifting to a dry quarter. It may be spread by inoculation, 

 but is not contagious. The agent in its dissemination is some suctorial 

 insect, but whether the agent is Tahanus or Musca brava or a mosquito 

 is uncertain. 



Trypanosomiasis of Horses in the Philippines.! — W. E.Musgrave 

 and N. E. "Williamson submit a preliminary report on this disease. 

 They discuss (1) the history of the epidemic in the Philippine Islands, 

 involving a direct loss of not less than two million dollars in l'.toi and 

 1902 ; (2) the mode of transmission and infection, — trypanosomiasis is a 

 wound-disease, the infectious organism being brought into contact with 

 a wounded surface by insects, with this further complication that 

 •" Manila rats " are also infected with the Trypanosoma of the horse 

 disease ; (?>) the symptoms and diagnosis ; and (4) the preventive mea- 

 sures through proper quarantining and by enforcement of efficient 

 sanitary regulations. 



Development of Gregarines.§ — L. Leger and 0. Dubosq contribute 

 some notes on the life-history of Stylorhynchidre and Stenophorida?, as 

 represented by Stylorliynclms lonyicolUs F. St., and Stenophora brbUmanni. 



* Centralbl. Bakt. Parasitenkunde, l te Abt, xxxiv. (1903) pp. 144-9 (1 pl.).| 



t Zeitschr. Hyg. und Infektionskrankheiten, xxxix. p. 323. See Centralbl. Bakt. 

 Parasitenkunde, 1" Abt., xxxi. (1902) pp. 755-8. 



\ Publications of Department of the Interior Bureau of Government Laboratories, 

 Manila, 1903, No. 3, 20 pp. (2 pis.)- 



§ Arch. Zool. Exper., 4th ser. vol. i. Notes et Revue, No. 6, pp. lxxxix.-xcv. 

 (2 rigs.). 



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