42 Annals Entomological Society of America [Vol.11. 



EXPLANATION OF PLATES V, VI, VII. 



Callipterus bctitlcecolens (Fitch) Monell. — Plate V, figs. 1-8. 

 Figure 1, antenna of winged viviparous 9 ; 2, head; 3, antenna; 4, hind 

 tibia; 5, cornicle; 6, style of wingless oviparous 9 ; 7, antenna; 8, wing of winged 



Callipterus {Encallipterus) tilice (Linn.). — Plate V, figs. 9-16; Plate VI, 

 figs. 19-20. 



Figure 9, antenna; 10, wing; 11, hind femora; 12, cornicle; 13, style of 

 Avinged viviparous 9 ; 1-i, antenna; 15, hind tibia of wingless oviparous 9 ; 16, 

 antenna of winged cj* ; 19, head of winged viviparous 9 ; 20, of wingless ovipar- 

 ous 9 ■ 



Macrosiphum liriodendri Monell. — Plate V, figs. 17-18; Plate VI, figs. 21-27. 



Figure 17, cornicle; 18, style; 21, head; 22, antenna; 23, wing of winged 

 viviparous 9 ; 24, antenna of wingless viviparous 9 ; 25, antenna; 26, hind tibia 

 of wingless oviparous 9 ; 27, antenna of winged cJ*. 



Macrosiphum cynoshati Oestlund. — Plate VI, figs. 28-29; Plate VII, figs. 

 30-36. 



Figure 28, style; 29 cornicle; 30, antenna; 31, wing of winged viviparous 9 ; 

 32, head; 33, antenna of wingless viviparous 9 ; 34, antenna; 35, hind tibia of 

 wingless oviparous 9 ; 36, antenna of winged c?- 



Aphis ccphalanthi Thomas. — Plate VII, figs. 37-45. 



Figure 37, head; 38, antenna; 39, wing; 40, cornicle; 41, style of winged 

 viviparous 9 ; 42, antenna of wingless viviparous 9 ", 43, antenna; 44, hind tibia 

 of wingless oviparous 9 ; 45, antenna of winged cJ*. 



