SUBFAMILY APHINAE 67 
Genotype Cepegillettea betulifoliae Granovsky 
Sen. 
“Apt. Viv. 87 Sen, 10-15 
After Grane vshy) 
Fig. 66. Cepegillettea betulifoliae 
Cepegillettea betulifoliae Granovsky, 1928b:115; Gillette and Palmer, 1931:898. 
Alate Vivipara. Yellowish green; with head and thorax yellow-brown; antenna annu- 
lated with black; legs pale; stigma yellow. Body 2.5 long; antenna 5.22, minutely imbricated, 
secondary sensoria oval; rostrum attaining 2d coxa. Fore wing with media twice-forked. 
Other characters as in description for genus. 
Apterous Vivipara. About the same as alata except sensoria 10-15 on III. 
Male. ‘‘Alate.”’ 
Collections. On leaves of Betula sp. Colorado: Fort Collins. Alate and ap- 
terous viviparae Aug. 18; rare. 
Cotypes. U.S.N.M., Granovsky and Colo. Agr. Exp. Sta. Collecticns. 
Genus Chromaphis Walker 
Walker, 1870:2001; Essig, 1912b:763; Baker, 1920a:27; Theobald, 1927:355. 
Characters. Frontal tubercles undeveloped; vertex convex. Antenna shorter 
than body, unguis much shorter than base of VI. Cornicle truncate. Cauda 
globular or knobbed; anal plate emarginate not bilobed. Hairs on antenna 
minute; on body of alate vivipara simple and short; on ovipara and nymph mod- 
erately long and capitate. Living on leaves and twigs of trees. 
Genotype (monotypical), Lachnus juglandicola Kaltenbach. 
This genus differs from Panaphis (considering characters of the genotype, 
juglandis) as follows: Anal plate not bilobed but only slightly indented, hairs on 
body in alate vivipara not long or numerous but very short and sparse. 
Only one species represented in region. 
Genotype Chromaphis juglandicola (Kaltenbach) 
The Walnut Aphid 
SR A 0 HO err ceo CRA ae more d eon i 
verre 26-40 Sen68 -5--23 13-19 08 93 a 
Alate Viv. 
see 34 
9 Sei Oa3 "08s ae O09 
ake 67. Chromaphis juglandicola 
Lachnus juglandicola Kaltenbach, 1943:151. 
Callipterus juglandicola, Essig, 1909b:51. 
Chromaphis juglandicola, Davidson, 1914b:1; Theobald, 1927:355. 
Fundatrix. Alate. Same as summer alate vivipara. 
Alate Summer Vivipara. Head, thorax and abdomen pale lemon-yellow to salmon-pink 
to brownish (sometimes thorax light brown); legs pale with black spot distally on hind femur; 
antenna annulated; wings hyaline, stigma pale gray; cornicle and cauda pale. Body length 
1.6-2.5; hind tibia .65-.70; hind tarsal II .10; antenna .77-1, secondary sensoria on antenna 
oval, transverse, scattered in single row along entire length of III; cornicle about as wide as 
long, truncate, tapering, with occasional hairs. Fore wing with radial sector faint, especially 
at base; media twice-forked. Rostral IV+V .05 long, attaining between Ist and 2d coxae. 
