■183- 



Figure 4-9. Long-slender, nondividing, binucleated promastigote seen 

 in a 5-day infection of Leishmania mexicana in Lutzomyia 

 diabol ica (bar represents 10 pm) . 



Figure 4-10. Extremely long mononucleated form seen in a 5-day infection 

 of Leishmania mexicana in Lutzomyia diabolica . (bar repre- 

 sents 10 urn). 



