THE CANADIAN ENTOMOLOGIST. 



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Fig. 17. — Longisection of stem and cocoon ol D. crassipes. 



n., cavity made by abdominal appendages ; \.., feeding 



cavity. 

 n 1 8. — Exterior view of root, showing feeding spot (1) and scars of 



abdominal appendages (n). 

 ,, ig. — Under side of cocoon when removed from stem ; 1., 



opening ("Oeffuung in demselben"). 

 n 20.— Lateral aspect of an abdominal appendage; I.e., lower canal 



("der untere unpaare kanal"). 

 n 21. — Sketch of larva oi Donacia crassipes, enlarged; a., anus. 

 n 22. — Lateral aspect caudal segments of larva of D. crassipes. 

 I! 23.— Dorsal aspect of same. 



