4IO EDMUND B. WILSON. 



PLATE III. 



(Podisus crocatus, 33; Pentatoma juniperina, 34, 35; P. senilis, 36-46.) 



FIG. 33. Late prophase, Podisus crocatus; 34, the same, Pentatoma juniperina; 

 35, first spermatocyte-anaphase of the same species; 36-43, stages in the develop- 

 ment of the spermatids, P. senilis; the large dark body is the chromatoid body; 

 44, 45, central region of the tail, later spermatids, showing protoplasmic swelling 

 enclosing chromatoid body; 46, group of cast-off protoplasmic balls lying between 

 the sperm-tails, four containing chromatoid bodies, young spermatozoa. 



