Witcox. — Caloptenus femur-rubrum. 
Figs. 1, 2. 
Fig. 3. 
Figs. 4-18. 
Figs. 19-25. 
Figs. 26, 27. 
PLATE 1. 
Caloptenus femur-rubrum. 
Spermatogonia in dyaster stage. 
Spermatogonium in resting condition. 
Spermatocytes, various prophases of the first division, — spirem, dumb- 
bell, and ring stages. 
Spermatocytes during the jirst division. 
Polar view of spermatocytes during second division. 
