SUBFAMILY APHINAE Zon 
ing between lst and 2d coxae. Vertex distinctly convex, imbricated; frontal tubercles devel- 
oped equal to vertex and bearing short fingerlike processes on ventral surface. 
Alate Vivipara. Head and thoraric lobes light to medium brown to blackish; abdomen 
pale green with darker longitudinal streaks on median and lateral portions; antenna beyond 
base of III, femora, tips of cornicles and tibiae dusky to blackish; cauda and cornicle, except 
tip, pale yellowish. Body length 1.40-1.70; hind tibia .70-.95; antenna 1.1-1.3. Hairs pointed, 
sparse. Cornicle cylindrical, rather slender, with slight flange, proximal half with transverse 
wrinkles. Cauda elongate-tapering, bearing two pairs of lateral hairs. Lateral tubercles 
developed on prothorax and abdominal I and VII. 
Ovipara. Apterous. Color and measurements as in summer apterous vivipara except hind 
tibia which is blackish and but slightly swollen on middle half and bearing about 23 rather 
large flat sensoria. 
Male. Alate. Color and measurements as in alate vivipara except as follows: Body 
length 1.2; hind tibia .60 and antennal III, IV and V bearing numerous sensoria. 
Collections. On wheat, oat, barley and Agropyron sp. Colorado: Through- 
out the eastern part of state. Utah: Circleville. Apterous summer viviparae 
April 2 to Aug. 24, alate viviparae April 2 to Oct. 30, sexuales Oct. 17 to 24; 
common, often in injurious numbers. 
Toxoptera muhlenbergiae Phillips and Davis 
Toxoptera muhlenbergiae Phillips and Davis, 1912:9. 
Apterous Summer Vivipara. ‘‘Pale green’’; antenna beyond base of III and legs, espe- 
cially at tips of tibiae, dusky. Body length 1.2-1.4; across eyes .34-.38; hind tibia .42-.50; 
antenna .78-.85; rostrum attaining 2d coxa. Cornicle cylindrical and without distinct flange. 
Cauda tapering to slightly spatulate and bearing 2 pairs of lateral hairs. Vertex produced in 
center and imbricated. 
Apt. Viv. 7 Co. f 
H4>t7 .0Ba11 .09-\2).07.  .2.5490 AptLi¢a20) REO ES 
sen. 4-8 Alate. 12-16 ie 08 
; : TO. 
, : Tib. 
ieee 26-35 Ha.Ti = 
Fig. 266. Toxoptera muhlenbergiae 
Alate Vivipara. Head and thorax dark; abdomen “pale green, pale around cornicle base’’; 
antenna beyond base of III and legs dark. Body length 1-1.45; across eyes .35; hind tibia .60; 
antenna about 1. 
Collections. On Hordeum sp. Colorado: Fort Collins. Apterous viviparae 
July 24, alate viviparae July 26 and Aug. 27; rare. 
Cotypes. U.S.N.M. . 
Chief Distinguishing Characters. Short antenna (III not longer than 3 times 
rostral IV+V), short cornicle (once to twice rostral IV-+V) and small number 
of sensoria (not more than 5 on III of alate vivipara). 
Toxoptera viridi-rubra Gillette and Palmer 
Toxoptera viridi-rubra Gillette and Palmer, 1932a:136, and 1932b:495. 
Fundatrix. Reddish brown or mahogany, mottled with paler color; cauda slightly dusky; 
cornicle and tarsi black; antenna dusky throughout; tibiae pale except tips. Body length 2.10; 
hind tibia .66; hind tarsal II .09; antenna 1.10, III and IV coalesced. Otherwise as in apterous 
summer vivipara. 
Alate Vivipara. Head and thorax black; abdomen reddish-brown or olive-green with 
Orange stain about and between cornicle bases, with dusky lateral areas; antenna dusky 
throughout; cornicle black; cauda pale; anal plate dusky; legs mostly pale yellow. Body 
length 1.1-2; hind tibia .77-.90; hind tarsal II .09; antenna 1.4-1.5, secondary sensoria flat, 
arranged in single row along almost entire length of III; rostrum rather broadly obtuse, 
attaining nearly to 2d coxa. Hairs on vertex slightly capitate; on antenna and hind tibia 
pointed. 
Apterous Summer Vivipara. Body 2 by 1.25; hind tibia .80; hind tarsal II .09; antenna 
1.35; rostrum as in alate vivipara. Vertex slightly convex; frontal tubercles exceeding vertex 
by .02, each bearing a rudimentary fingerlike projection. Hairs on vertex slightly capitate; 
on antenna pointed; on hind tibia pointed, longer than diameter of tibia. Cornicle cylindrical 
with tendency to constriction next to distinct flange, imbricated, at least as wide as hind 
