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chromatic granules scattered about the protoplasm (Fig. 1). Similar 
forms have been regarded as male gametes, of course without any 
proof. 
Diagram XI. 
Degenerative changes of Herpetomoms calUphorae (flagellate form), in the midgut of a 
fly, fed on honey. 
1. “ Chromidial ” flagellate. 
2. 4. Hypertrophy and desintegration of the nucleus and the blepharoplast. 
3. Flagellate stained with Giemsa’s solution and treated afterwards with iodine to show 
the distribution of volutin. Note the volutin granules in the blepharoplast. 
5, 6. Anuclear flagellates. 
Especially interesting are the flagellates represetited in Figs. 2-4, 
from a fly which had been fed on honey for one day. All these 
flagellates had become immobilised and showed a granular protoplasm. 
In stained preparations the nucleus and the blepharoplast showed 
hypertrophy (Fig. 4); and sometimes the nucleus was elongated into 
a spirally-wound filament (Fig. 2). Numerous granules were scattered 
about the protoplasm, and yvere composed of volutin. Fig. 3 (showing 
a flagellate treated with iodine after Giemsa’s stain, to make the 
