Williams' "The Aphididae of Nebraska" 39 



980, tip of cornicle greatly enlarged ; 99, style, of winged viviparous female. 



M. muralis Buckton, PI. VI, figs. 100, head and antenna; loi, cornicle; 

 loia, tip of cornicle greatly enlarged; 102, style, of winged viviparous 

 female; 103, antenna of wingless viviparous female. 



M. pelargonii Kaltenbach ?, PI. VI, figs. 104, head and antenna; 105, 

 cornicle; 1050, tip of cornicle greatly enlarged; 106, style, of winged 

 viviparous female; 107, antennal segment III; 108, hind tibia, of wingless 

 oviparous female. These drawings were made from specimens on slide 

 No. 148. 



M. solidaginis Fabricius, PI. VII, figs. 109, head and antenna; no, wing; 

 III, cornicle; 112, style, of winged male; 113, antenna of wingless 

 viviparous female. 



M. oenotherae Williams, PI. VII, figs. 114, head and antenna; 1 15, cor- 

 nicle; 116, style, of winged viviparous female. 



Myziis potentillae Williams, Pis. VII and VIII, figs. 117, head and an- 

 tenna; 118, wing; 119, cornicle; 120, style, of winged viviparous female; 

 121, head and antenna of wingless viviparous female. 



Macrosiphnm purpurascens Oestlund {Mysns thalictri Williams), PI. 

 VIII, figs. 122, head and antenna of winged viviparous female; 123, head 

 and antenna; 124, cornicle; 125, style, of wingless viviparous female; 126, 

 antenna of winged male; 127, antenna of wingless oviparous female. 



Mycus persicae Sulzer (Phorodon cynoglossi Williams), PI. VIII, fig. 

 128, head and antenna of winged viviparous female. 



Rhopalosiphum monardae Williams, PI. VIII, figs. 129, head and an- 

 tennae; 130, wing; 131, cornicle, of winged viviparous female. 



All drawings made by the aid of an Abbe camera lucida, using the fol- 

 lowing objectives and eyepieces: 



Two-inch eyepiece and one and one half objective: Figs, i, 3, 8, 2>7, 47. 

 59, 81, 130. 



iOne-inch eyepiece and two thirds objective: Figs. 2, 4, 6, 34, 80, 82, 



83, 131. 



Two-inch eyepiece and two thirds objective: Figs. 5, 7, 9, 12, 13, 14, 31, 

 22, Z2>, 35, 36, 46, 48, 49, 50, 60, 61, 62, 94, 95, 96, no, 128, 129. 



Two-inch eyepiece and 16 mm objective: Figs. 10, 24, 25, 26, 42, 43, 44, 

 45, SI, 54, 55, 56, 57, 58, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 72, 74, 75, 84, 89, 

 90, 91, 92, 97, 98, 99, 100, loi, 102, 103, 104, 105, 106, 107, 108, 109, III, 112. 

 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127. 



One-inch eyepiece and 16 mm objective: Figs, il, 15, 16, 17, 18, 19, 20, 21. 

 22. 29, 30, 38, 39, 40, 52, 53, 7^, 77, 78, 79, ^7, 88, 93, 98a, loio, 105a. 



One-inch eyepiece and 4 mm objective: Figs. 85, 86. 



291 



