379 
Explanation of Plates 
PLATE I 
Cinara pseudotsugae. 1, fundatrix; 2, young summer vivipara, ist instar; 3, 
same, later instar; 4, adult summer vivipara; 5, alate summer vivipara; 6, ovi- 
para; 7, male. 
Cinara pseudotaxifoliae. 8, newly hatched fundatrix; 9, adult fundatrix; 10, 
alate summer vivipara; 11, apterous summer vivipara, adult; 12, young summer 
vivipara, lst instar; 13, same, 3rd instar; 14, ovipara; 15, egg. (After Palmer, 
1926. Ann. Ent. Soc. Amer. 19, Plate 24.) 
PLATE II 
Cinara occidentalis. 1, egg; 2, freshly laid egg; 3, newly hatched fundatrix; 4, 
adult fundatrix; 5, alate vivipara; 6, ovipara. 
Cinara oregonensis. 7, young fundatrix, 1st instar; 8, adult fundatrix; 9, alate 
vivipara; 10, male; 11, ovipara; 12, freshly laid egg. (After Palmer, 1926. Ann. 
Ent. Soc. Amer. 19, Plate 26.) 
PLATE III 
Capitophorus longipes. 1, alate vivipara; 2, apterous summer vivipara. 
Macrosiphum glabrum. 3, apterous summer vivipara; 4, alate vivipara. 
Macrosiphum frigidicola. 5, apterous summer vivipara; 6, alate vivipara; 7, 
male; 8, ovipara; 9, egg. 
Chaitophorus populella. 10, young apterous summer vivipara, early instar; 11, 
adult apterous vivipara; 12, alate vivipara. (After Gillette and Palmer, 1928. 
Ann. Ent. Soc. Amer. 21, Plate I.) 
PLATE IV 
Macrosiphum sonchellum. 1, apterous summer vivipara; 2, alate vivipara. 
Myzus leucocrini. 3, apterous summer vivipara; 4, alate vivipara. 
Kakimia polemonii. 5, alate vivipara; 6, male. 
Amphorophora geranii. 7, alate vivipara; 8, apterous summer vivipara. 
Rhopalosiphum bossekiae. 9, apterous summer vivipara; 10, alate vivipara. 
(After Gillette and Palmer, 1928. Ann. Ent. Soc. Amer. 22, Plate I.) 
PLATE V 
Aphis pentstemonicola. 1, fundatrix, X 15; 2, young born of fundatrix, X 15; 
3, alate vivipara, X 15; 4, apterous summer vivipara, X 15; 5, young born of 
summer vivipara, X 15; 6, ovipara, X 15; 7, male, X 15. 
Aphis phaceliae. 8, alate vivipara, X 15; 9, fundatrix, X 15; 10, late apterous 
vivipara, X 15; 11, ovipara, X 15. 
Braggia echinata. 12, alate vivipara, X 20; 13, apterous summer vivipara, X 20; 
14, ovipara, X' 20; 15, male, X 16. (After ‘Gillette and Palmer, 1929. Ann. Ent. 
Soc. Amer. 22, Plate VII.) 
