ENTOMOLOGY

fl18SANITARY ENTOMOLOGYpossibly G. mor8itana. The development in the gut of palpali8 is similarto that described above for T. gambieme. Multiplication begins in thehind intestine and by the tenth day numerous parasites are found in thehind and middle intestine. The slender forms begin to be produced fromthe tenth to the fourteenth day' onward, and the proventriculus isusually invaded about the twentieth day. About the 25th day they invadethe proboscis, where they may be found attached to the labrum, oftenlying in clusters. They tl~en pass through the crithidial phase, many ofthem being extremely long and slender. Subsequently trypanosome formsare produced which may be found free, sometimes in the hypopharynx andat other times in the labrum ... The salivary glands never become infected.(Taken from Hindle who summarizes the work of Duke and others.)DuttoneUa pecorum (Bruce, Hamerton, Bateman and Mackie), causeof a WILD ANIMAL TRYPANOSOMIASIS, is carried by Glo88inamor8itana, G. tachinoide8, G. palpalia, and G. brC'Oipalpis, in the alimentarycanal of which it undergoes its cyclical development.Duttonella aimiae (Bruce, Harvey, Hamerton, Da.vey and LadyBruce), cause of SIMIAN TRYPANOSOMIASIS, is carried by Glossinamor8itans and G. brC'Oipalpis.tDuttonella uniforme ,(Bruce, Hamerton and Mackie), a fatal TRY­PANOSOMIASIS of cattle, with wild animal reservoirs, is naturallycarried by Glossina palpalis, which becomes infective in from 27 to 87days. The infection of the fly is always limited to the proboscis.Duttonella vivax (Ziemann) Chalmers, cause of a bovine and ovineTRYPANOSOMIASIS, is carried by Glo88ina tacltinoide8, and probablyby G. palpalis and G. mor8itana. Stomoxys and Lyperosia are suspectedcarriers. The incubation period of the fly is from five to eight days.Trypano8oma franki Frosch, cause of a TRYPANOSOMIASIS OFWILD GAME in Europe, is believed to be transmitted by Hippobo8cidaeand Tabanidae.Trypanosoma gallinarwm, cause of FOWL TRYPANOSOMIASISof the domestic fowl, is carried by Glo88ina palpalia, according to Duke(191fl).Trypanosoma grayi Novy, cause of CROCODILE TRYPANOSOMI:­ASIS in Africa, is carried by Glo88ina palpali8 and G. brevipalpia.Trypano8oma theileri Laveran, thought to cause GALL SICKNESSof cattle by some authors, was experimentally transmitted by Theiler inSouth Africa by bite of Hippobo8ca rujipe8 Von OIfers and H. maculataLeach.Trypano8oma tullochi Minchin is native to Gl088ina palpalk inAfrica, and no vertebrate host is as yet known.