SMITHSONIAN MISCELLANEOUS COLLECTIONS, VOL. 137 



BODENSTEIN, PL. 1 



Parabiosis between white-eyed (left) and black-eyed (right) Periplaneta 

 amcricana nymphs. Parabiotic pair after the third postoperative molt, 73 days 

 after fusion. Note: Eye on left partner has remained white. 



