ENTOMOLOGY

DISEASES TRANS~lITTED BY BLOODSUCIHNG FLIES 215Castellanella equtperdum (Doflein) Chalmers, cause of DOURINE ofhorses, has been experimentally transmitted by interrupted feedings ofthe stable fly, Stomoxys calcitrans Linnaeus and Atylotua tomenlosuaMacquart by Sergent and Sergent (1906).CasteUanella evansi (Steel) Chalmers, cause of SURRA of cattle amIhorses, has been experimentally transmitted by bites of Stomoxys calcitransLinnaeus, S. geniculatua Bigot and S. nigra l\Iacquart. Eithel'experimental evidence or strong suspicion points to transmission by thehorse flies, TabOlTtus tropicua Linnaeus, T. striatua Fabr.icius, T. lineolaFabricius, T. atratus Fabricius, T. fumifer Walker, T. partitus Walker,•H_I(A_ ... ~)WII.D R,K,.,VO'"LIrE CYCLE Of TRYPANOSOMA MMBIENSE.THSCAUS .. Of"GAMBIIINSLlZPfNG Slcll .. ",o..MANH.,' TMKLAI'fIU' .P&IIEI ~lM£).HClP' .. m.GutUl~"" AALM.L.lS (.,..en ......... ).ii_ m. H.yo SAPICNS (MAo").FIG. 49.(Pierce.)T. vagus Walker, T. minimus Van der Wulp, and other species of Tabanusand Haematopota. Certain writers have also suspected Lyperosia minutaBezzi, Philaematomyia crassirostris Stein and Lyperosia etEigua l\leigen(Haematobia). The parasite has also been found in the stomach ofStomo:cys geniculatua.Castellanella evans;' mborii (Laveran), cause of MBORI, a cameltrypanosomiasis of Africa, is believed to be carried by Tabanus tacniatuaMacquart and T. biguttatua Wiedemann.Castellanella gambiense (Dutton) Chalmers (nigene'1lo8e Macfie),cause of GAMBIAN AND NIGERIAN SLEEPING SICKNESS of man,has wild animals for its reservoir, and is principally transmitted by Glossina.palpalis Robineau-Desvoidy and its variety fuacipes. Experimental