152 APHIDS OF THE ROCKY MOUNTAIN REGION 
Apterous Summer Vivipara. Black on entire dorsum, polished in adult, dull and pulveru- 
lent with slaty grayish tint in nymph, pale grayish green in new-born young; cornicle, anal 
plate, genital plate and cauda black; appendages whitish with blackish tips. (Cleared and 
mounted), head dark and dark bands including lateral areas on all segments, broken anterior 
to abdominal II, mostly coalesced into a solid patch on abdominal II to VIII. Body length 
1.6-1.9, width 1-1.1; hind tibia .90; hind tarsal II .12; antenna 1.1; rostrum attaining about 
to 3d coxa. Cauda nearly parallel-sided, rounded at tip, bearing 2-4 hairs on each side and 
one dorsal preapical one. 
Alate Vivipara. Same in above described characters as apterous vivipara except (cleared 
and mounted) dark markings as follows: Head and thorax and on abdomen lateral areas and 
dorsal bands, the latter varying from nearly coalesced to greatly broken and fragmentary on 
abdominal I to IV. Hairs pointed, drooping, sparse; on antenna about .01-.02 long; on tibia 
.03. Lateral tubercles prominent on pronotum and abdominal I, II and VII, usually present 
but smaller on intervening segments. 
NIRS SARIS SEND SEY 5 
Ti) Co. (STEN, 26-35 )) hii) 
Fig. 169. Aphis medicaginis 
Collections. On leaves and stems of locust (Robinia sp.) as winter host; 
as summer hosts: Amaranthus sp., Aragallus sp., Astragalus sp., shepherdspurse 
(Capsella bursa-pastoris), lambsquarters (Chenopodium album), bee spider- 
flower (Cleome serrulata), dodder (Cuscuta sp.), carrot (Daucus carota), 
tansymustard (Descurainia sp.), Eriogoum alatum, Gaura coccinea, Glycerrhiza 
lepidota, Kochia scoparia, lettuce (Lactuca sp.), pepperweed (Lepidium sp.), 
apple (Malus sp.), Malva neglecta and M. sp., alfalfa (Medicago sativa), white 
sweetclover and yellow sweetclover (Melilotus alba and officinalis), Oxytropis 
sp., lima bean (Phaseolus lunatus), kidney and pinto beans (P. vulgare), 
Polygonum sp., Rumex sp., Salsola sp., Solidago sp., Taraxacum officinale, red 
clover (Trifolium pratense), wheat (Triticum vulgare), Vicia sp., and Vigna 
sinensis. Throughout region. Apterous summer viviparae March 25 to Nov. 10, 
alate viviparae April 3 to Nov. 19; very common. 
Chief Distinguishing Characters. Whitish appendages, shining black body 
of adult, dull pulverulent slaty gray color of nymph and small number of 
sensoria on III of alate vivipara. 
Some aphidologists consider this species identical with A. laburni Kalten- 
bach but Kaltenbach says antenna “gekornt” which better fits A. fabae. 
Aphis menthae-radicis Cowen 
Aphis mentbae edie: Cowen (in Gillette and Baker) 1895:121; Gillette and Palmer, 
2r4bi. 
Apterous Summer Vivipara. Green with black dorsal dashes; to the naked eye appar- 
ently a dull lead color; appendages mostly black. Body length 1.8-2; hind tibia .73-.80; an- 
tenna .75-.80. 
Dye AP Viv, Sen. 
Alate Vivipara. Abdomen green; head, thorax, lateral areas and dorsal dashes on ab- 
domen black. Body length 2; hind tibia .95; antenna 1.03, sensoria unequal in size, arranged 
in irregular single row; rostrum attaining between 2d and 3d coxae. Cauda broadly tapering, 
blunt, bearing 6-8 hairs on each side and a dorsal preapical one near tip. Hairs pointed, droop- 
ing; .02-.03 long on III and vertex. Lateral tubercles present. 
