Researches on Insect Flagellates introduced into Vertebrates. 147 
are arthropod-borne herpetomoniases, and that these maladies 
have been evolved from flagellates of invertebrates (especially 
herpetomonads of insects), which have been able to adapt them- 
selves to life in vertebrates. 
6. In areas where leishmaniases are endemic, an examination 
should be made of all insects and other invertebrates likely to 
‘come into contact with men or dogs or rats and mice, in order to 
ascertain if these invertebrates harbour herpetomonads. Preven- 
tive measures should be directed against such invertebrates, 
especially arthropods. Further, it is likely that certain verte- 
brates, such as reptiles and amphibia (especially those that are 
insectivorous), May serve as reservoirs for leishmaniases or, as they 
should preferably be termed, herpetomoniases. From such reser- 
voirs the herpetomonads may reach man by the agency of 
ectoparasites or flies, especially such as are sanguivorous. 
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