Figure Page 



3-13. Adult emergence patterns of Lutzomyia diabetica 



reared individually at 24°C and 27"C. 127 



3-14. Emergence patterns of 12th generation Lutzomyia 

 diabolica adults reared at 27°C and 87% RH 

 on five larval diets 128 



4-1. Histiocytoma on the ear of a hamster infected with 



Leishmania mexicana 165 



4-2. Infecting sand flies in a three-sleeved isolation 

 chamber by feeding them on a leishmanial 

 histiocytoma on a hamster's ear 165 



4-3. Diagram of a sand fly alimentary tract 171 



4-4. Development of Leishmania mexicana in 



Lutzomyia diabolica 180 



4-5. Long-slender promastigotes of Leishmania mexicana 

 swimming freely in the hind triangle of an 

 infected sand fly, Lutzomyia diabol ica 181 



4-6. Short-broad promastigotes ("haptomonads") of 



Leishmania mexicana spewing into the dissecting 



medium at the site of a rupture in the gut wall of 



a sand fly, Lutzomyia diabol ica 181 



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

 massed at the stomodeal valve in the gut of a 

 female sand fly, Lutzomyia diabolica , infected 

 with Leishmania mexicana 182 



4-8. Severed anterior aspect of the cardia in a female 

 sand fly, Lutzomyia diabolica , showing massive 

 numbers of Leishmania mexicana promastigotes 

 ("haptomonads") attached to the stomodeal valve 182 



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

 seen in a 5-day infection of Leishmania 

 mexicana in Lutzomyia diabolica 183 



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

 infection of Leishmania mexicana in 

 Lutzomyia diabol ica 183 



4-11. Large peanut-shaped flagellate observed in infected 

 and uninfected laboratory-reared Lutzomyia 

 diabolica females 187 



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