126 



Bulletin 233. 



Fig. 27. — The European elm sazvfly. The saw-like ovipositor projects from the 

 abdomen of the lower sawfiy. The flics arc shoivn much enlarged, as 

 I hey measure only s millimeters in length. 



Fig. 28. — The European alder saivfly and its eggs 



stuck in leaf (above), both much cuLirged; 



the fly measures only _j milliiiM'tcrs 



in length. 



