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SUSANNE BUSER 



established. The loss of neuropil is relatively constant in each nerve, eut during 

 the diapause. The motor neurons affected by the opération do not degsnerate. 



3. Axons of motor nerves can regenerate. Thèse régénérations do not resemble 

 either the nerve of the pupa in diapause or those of the adult. They do not 

 always émerge from the ganglion at the site of the degenerated normal nerve. 

 Regenerated nerves are significantly thinner and too short to reach again the 

 organs coordinated with them. 



4. The axons of sensitive nerves grow in great numbers towards the center, 

 presumably following the stumps. Frequently they reach the vicinity of the 

 ganglions, but do not fuse with them, instead they grow passing them by. 



5. No fusion of motor régénérations with sensitive nerves could be seen. Thus 

 the régénérations fail to get a conducting structure towards the periphery. 



6. In the diapausing pupa the wounded epidermis produces a cicatrice. This 

 regenerated epidermis is able to excrète chitin, but lacks the détermination to 

 build up spécifie sceletal structures. 



7. Muscle rudiments which terminal fixation has been detached from the 

 epidermis, difïerentiate and attach again on the epidermis or skeleton. 



8. Muscle rudiments of which the epidermal fixation has been removed, 

 difïerentiate into muscles longer or shorter than normal. In each case they search 

 after a new point of fixation on another zone of epidermis. 



LITERATURVERZEICHNIS 



Basler, W. 1969. Untersuchung der Nervenwirkung bei Antheraea pernyi Guer. (Lep.). 



Rev. suisse Zool. 76: 297-362. 

 Bienz, G. 1968. Elektronenmikroskopische Untersuchimgen iiber die Entwickhmg der 



dorsolongitudinalen Flugmuskulatur von Antheraea pernyi Guer. (Lep.). 



II. Teil, Acta anat. 70: 523-553. 

 Bodenstein, D. 1955. Contributions to the problem of régénération in insects. J. Exp. 



Zool. 129: 209-224. 



— 1957. Studies on nerve régénération in Periplaneta americana. J. Exp. Zool. 136: 

 89-115. 



Chiarodo, A. J. 1963. The effects of mesothoracic leg dise extirpation on the post- 

 embryonic development of the nerve System of Sarcophaga bullata. J. Exp. 

 Zool. 153: 263-277. 



Cohen, M. J. and J. W. Jacklet. 1965. Neurons of insects : RN A-changes during injury 



and régénération. Science. 148: 1237-1239. 

 Eigenmann, R. 1965. Untersuchurgen iiber die Entwicklung der dorsolongitudinalen 



Flugmuskulatur von Antheraea pernyi Guer. (Lep.). Rev. suisse Zool. 72: 



789-840. 



