■182- 



Figure 4-7. Short-broad, dividing promastigotes ("haptomonads") massed 

 at the stomodeal valve in the gut of a female sand fly, 

 Lutzomyia diabol ica , infected with Leishmania mexicana (4-day 

 infection; approx. magn. x 2500). 



Figure 4-8. Severed anterior aspect of the cardia in a female sand fly, 

 Lutzomyia diabol ica , showing massive numbers of Leishmania 

 mexicana promastigotes ("haptomonads") attached to the stomo- 

 deal valve (4-day infection; differential interference con- 

 trast; approx. magn. x 1050). 



