SUBFAMILY APHINAE 125 
1.75-2; hind tibia .90; hind tarsal II .10; antenna 1.12-1.4, secondary sensoria circular, tuber- 
culate; rostrum obtuse, hardly attaining 2d coxa. Hairs pointed, sparse, drooping and short. 
Cornicle cylindrical or slightly tapering, with denticulate imbrications and distinct flange. 
Cauda bearing 3-4 hairs on each side. Lateral tubercles present. Alatoid Nymph. Body pale 
yellowish, marked on the abdomen with deep salmon, leaving pale orange blotch about the 
base of the cornicle; dusky specks entirely absent; wing pads brownish yellow. 
Ovipara. Apterous. Immature. Light green to pinkish with dusky head and cornicle 
and with 6 longitudinal rows of dark specks posterior to pronotum. Mature. Red anteriorly, 
yellow tinged with pink posteriorly, with numerous dusky spots, abdomen mottled with eggs 
showing through. Appendages pale, with tarsi and tip of antenna blackish. Body length 1.35; 
antenna five- or six-segmented, .51. 
Male. Alate. Color and measurements same as in alate vivipara. 
i fie 
eg tet 
Fig. 132. Aphis bakeri 
Collections. On tips of twigs, leaves and blossom buds of hawthorn 
(Crataegus sp.), quince (Cydonia sp.), apple (Malus sp.) and pear (Pyrus com- 
munis) as winter hosts; on alfalfa (Medicago sativa), sweet clover (Melilotus 
sp.) and red and white clover (Trifolium sp.) as summer hosts. Throughout 
region. Fundatrices on winter hosts Mar. 19 to June 11, apterous viviparae on 
winter hosts May 8 to July 8, on summer hosts Mar. 22 to Dec. 23; alate vivi- 
parae, spring migrants, on winter hosts April 24 to June 8, stragglers through- 
out summer, return migrants Sept. 3 to Dec. 18, on summer hosts March 22 to 
Dec. 13 or all winter in the case of individuals hibernating in viviparous form; 
sexuales on the winter hosts Sept. 26 to Dec. 9; eggs Nov. 1; very common; 
often causing serious damage on the clover grown for seed where it gums up 
the seed heads with honeydew and glues the seeds together in cakes in storage. 
The entire seed crop may thus become a total loss. 
Type. Lost. Neotype (selected by author), U.S.N.M. 
Chief Distinguishing Characters. Short cornicle with denticulate imbrica- 
tions, short rostrum hardly surpassing 2d coxa (IV+V .10 long), black dorsal 
patch on abdomen of alate vivipara and usual absence of secondary sensoria 
on V of alate vivipara. 
Aahie bonnevillensis Knowlton 
Aphis bonnevillensis Knowlton, 1928a:262 and 1928c:62; Gillette and Palmer, 1932b: 
384, 
Alate Vivipara. Blue-green to yellow-green; appendages including cornicle pale. Body 
length ‘‘1.12’’-1.33; antenna .80; hind tibia .90; hind tarsal II .11-.13. 
eect DO 
I-18 Wy [M17 09 ~)2 
Fig. 133. Aphis bonnevillensis 
