200 APHIDS OF THE ROCKY MOUNTAIN REGION 
of legs pale. Body length 1.3-1.45; across eyes .35-.40; antenna .75-1.10; hind tibia .60-.85; 
rostrum attaining near 3d coxa. 
Alate Vivipara. ‘‘Yellow-green; shiny’; appendages and cornicle blackish; cauda and 
anal plate concolorous with body; wing veins distinct and brownish black. Body length 1.30; 
across eyes .38; antenna 1.25-1.30; hind tibia .85; rostrum attaining 3d coxa. Hairs on body, 
and appendages capitate to blunt. 
Ovipara. Apterous. Color as in vivipara. Body length 1.-1.60; antenna .60-.90; hind tibia 
.45-.70; proximal half slightly swollen and bearing about 19 rather large sensoria. 
Male. Apterous. Color similar to vivipara. Body length .95; across eyes .37; antenna 
.85; hind tibia .60. 
Egg. ‘“‘Newly laid, whitish yellow; later, greenish yellow to bright green and finally 
shining black. Size .70-.80 long. Placed on scales below flower heads and on twisted leaves.” 
Fig. 231. Durocapillata utahensis 
Collections. On Chrysothamnus viscidiflorus, curling leaves and twisting 
tender tips. Utah: Throughout state. Idaho: Indian Massacre Rocks, Emigration 
Canyon and Preston. Alate and apterous summer viviparae July 5 and 18, 
apterae June 10 to Sept. 21, oviparae Sept. 22 to Oct. 17, apterous males Sept. 27; 
not common. 
Cotypes. U.S.N.M., and Utah Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Shape of cornicle, inconspicuous frontal 
tubercles. 
Genus Epameibaphis Oestlund 
Oestlund, 1922:132; Gillette and Palmer, 1932b:470. 
Characters. Frontal tubercles absent; vertex nearly flat. Secondary sen- 
soria circular. Cornicle cylindrical with conspicuous knoblike flange. Hairs 
blunt to capitate on body. Cauda tapering. Wing venation as in genus Aphis. 
Genotype (monotypical), Aphis frigidae Oestlund. 
Key to Species of Epameibaphis 
1. ‘Cornicle black in vivinarae:( ps 200) fess. oe A eee atricornis 
x Cornicle pale any vawip ara esi 2 cic ecte eacre tase eee Sac eae See ara eae ee 2 
2. Cornicle .40-.535 ILD bearingisensoria inrapterau( pa 20 cet eee eee frigidae 
Cornicle .29-.40; III not bearing sensoria in aptera (p. 202)..............-ccc-scscccsenceceneeee utahensis 
Epameibaphis atricornis Gillette and Palmer 
Epameibaphis atricornis Gillette and Palmer, 1933:348; Knowlton and Smith, 1936d:90; 
Palmer, 1936b:740. i 
Alate Vivipara. Head and thorax brown to black; abdomen medium brown with dusky 
lateral areas and dorsal bands which are broken on segments 1 to V; antenna except base of 
III, cornicle and entire legs black; cauda and anal and genital plates slightly dusky; veins 
of wings slightly smoky. Body length 1.30-1.40; across eyes .34; antenna 1.2-1.45; hind tibia 
.70-.80; rostral IV+V tip appearing needlelike in ventral aspect, attaining slightly beyond 
2d coxa. Cornicle cylindrical, knobbed at tip, smooth. Hairs fingerlike on body, pointed on 
appendages. Cauda bluntly tapering, bearing 2-3 lateral pairs of hairs and one or two dorsal 
preapical ones. 
Apterous Summer Vivipara. Medium brown; dusky on head, lateral areas on abdominal 
III, IV and V and solid bands on VII and VIII; frosted in appearance; antenna except II 
