PLATE 2 



Fig. 22. Myzocallis arundicolens (Clarke), antennal tubercles. 



Fig. 23. Drepanaplils acerifolii (Thomas), cornicle. 



Fig. 24. Drepanoiphum platanoides (Schr.), cornicle. 



Fig. 25. Monellia caryella (Fitch), cornicle. 



Fig. 26. Myzocallis bcllus (Walsh), cornicle. 



Fig. 27. Calaphis betulaecolens (Fitch), antennal tubercles. 



Fig. 28. Calaphis betulella Walsh, antennal tubercles. 



Fig. 29. Euceraphis betulae (Koch), antennal tubercles. 



Fig. 30. Eucallipterus tiliae (Linn.), sixth antennal segment and spur. 



Fig. 31. Myzocallis quercus (Kalt.), sixth antennal segment and spur. 



Fig. 32. Myzocallis quercus (Kalt.), cornicle. 



Fig. 33. Eucallipterus tiliae (Linn.), cornicle. 



Fig. 34. Chromaphis juglandicola (Kalt.), sixth antennal segment and spur. 



Fig. 35. Chromaphis juglandicola (Kalt.), cornicle. 



Fig. 36. Drepanosiphum platanoides (Schr.), third antennal segment. 



Fig. 37. Drepanaphis acerifolii (Thomas), third antennal segment. 



Fig. 38. Calaphis betulae-colens (Fitch), third antennal segment. 



Fig. 39. Euceraphis gillettei Dvdn., base of third antennal segment. 



Fig. 40. Euceraphis betulae (Koch), base of third antennal segment. 



