is less influenced by temperature changes while the active developmental 

 stages as larva, pupa and imago seem to be greatly affected by them. Between 

 these extremes we are able to find a number of transitory cases in direct 

 dependence on the changes in activity of respiratory enzymes (Fig. 3). 



mm^ От /granyhoi 

 iOO- 

 300- 

 200 

 100 



400- 

 303 

 200 

 100 



Pristiphora conjugata 



inter spring 



Ncurotoma nemoralis 



••t 



400 

 300 

 200-j 

 100 



Fig. 4. Respiratory metabolism during diapause and non-diapause development in sever- 

 al sawfly species. Arrows indicate the moment of pupation. — eonympb, — — — meso- 

 nymph, pronymph, — . — . — pupa. 



Respiratory quotient in various sawfly species maintains steady round 

 the value of 0-68 — 0'75 during entire diapause period. Evidently lipids co- 

 ver the greater part of energy needs in this time. In the period of histolysis-histo- 



199 



