I. TRAGARDH, METAMORPHOSIS AND BIOLOGY OF ORCHESTES. 25 



Fig. 14. O. popiili, labium, ventral view X 203. 



Fig. 15. » labruni, ventral view X 310. 



Fig. 16. O. fagi, mandible, » » X 310. 



Fig. 17. » » dorsal » X 310. 



Fig. 18. O. quercus^ mandible, dorsal view X 310. 



Fig. 19. » » ventral » X 310. 



Fig. 20. Part of leaf of willow, lower side. with egg chamber and 



beginning of gallery X 38. 



Fig. 21. Cocoon of O. fagi X 4. 



k 



Tryckt den 1 febr. 1910. 

 Arkiv för zoologi. Band 6. X.o 7. 



