170 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Vivipara. Head and thorax shining black; abdomen rusty brown or dark green with 
dark dorsal patch and lateral areas; antenna, cornicle and cauda dark; tibiae amber color with 
tips black; tarsi black. Body length 1.8-2; hind tibia 1.2; hind tarsal II .10; antenna 2, sec- 
ondary sensoria tuberculate; rostrum not surpassing 2d coxa. Vertex convex; antennal tuber- 
cles produced on medial margin, twice as much as vertex, bearing slightly capitate hairs. 
Antenna finely imbricated. Hairs inconspicuous, blunt or capitate; .02 long on hind tibia. 
Cornicle imbricated, cylindrical or slightly curved outward distally and with flange. Cauda 
very short, hardly apparent, tapering, acute, bearing 3 pairs of lateral hairs; anal plate with 
slight median protuberance. Lateral tubercles well developed, a pair of dorsal tubercles on 
head and abdominal VII and VIII. These dorsal tubercles are often apparently missing, 
especially in fall migrants. Surface of dorsum smooth. 
Male. Alate. Same as alate vivipara, especially fall migrant except dorsal patch which 
is more broken into bands. 
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45-50 
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Fig. 193. Aphis rosea 
Collections. On leaves and twigs of winter hosts, apple (Malus sp.), pear 
(Pyrus communis), and quince (Cydonia sp.), tightly curling leaves.* Colo- 
rado: Fort Collins and on the western slope of Rocky Mountains. Utah: Tooele, 
Provo, Farmington, West Jordan, Orem, Hobble Creek and Salt Lake City. 
Idaho: Wendell, Twin Falls and Filer. Fundatrices April 6 to May 8, apterous 
summer viviparae May 20 to July 23 and Sept. 20, alate viviparae April 27 to 
July 24 and Sept. 17 to Oct. 21, alate males Oct. 30 to Nov. 7; abundant in Colo- 
rado on western slope, not recorded as abundant or injurious east of the 
Divide in Colorado. 
This aphid causes serious economic losses where abundant, by badly 
curling leaves, stunting twigs and pitting, deforming and stunting fruit. 
Cotypes. U.S.N.M. 
Chief Distinguishing Characters. Short, acute, cauda with only 3 pairs of 
lateral hairs, long somewhat curved cornicle, long antenna (about same as 
body length) with numerous tuberculate sensoria, dorsal tubercles often pres- 
ent, purplish or reddish body and effect on the host plant (tight curling of 
leaves and deforming of fruit). 
Aphis rubicola Oestlund 
Aphis rubicola Oestlund, 1887:60; Winter, 1929:193; Hottes and Frison, 1931a:215; 
Gillette and Palmer, 1932b:438. 
Alate Vivipara. Head and thorax dark; abdomen greenish or yellowish; legs pale with 
tips of tibiae blackish; antenna, cornicle, tarsi and cauda dusky to blackish. Body length 
1.20-1.50; hind tibia .72-.85; antenna .85-1; rostrum obtuse, IV-+V slender, attaining between 
2d and 3d coxae. Hairs pointed, .015-.02 on antennal III; .03 on hind tibia. Cornicle approxi- 
mately cylindrical, narrower in middle, with slight tendency to swelling in distal half and 
with slight flange, imbricated rather coarsely. Cauda elongate-tapering, rounded at tip with 
slight tendency to constriction near base, bearing 5 or 6 pairs of lateral hairs. Lateral tubercles 
present, quite large on prothorax and abdominal VII. 
Apterous Vivipara. Pale yellowish green; appendages colorless, except tips of segments 
and entire tarsi which are dusky. Body length 1-1.10; hind tibia .50-.80; antenna .65-.85, III 
-18-.23, IV .11-.13, V .11-.13, VI .09-.10-+.18-.23; cornicle .21. Otherwise as in alate vivipara. 
*Plantago lanceolata has been found to be the summer host by Ross (1915:23), Baker 
and Turner (op. cit.) and other workers. This has not been verified in this region 
though this species of plantain was plentiful in infested apple orchards and the aphids 
left the apple trees in late July and considerable searching of the plantain was done 
in the field. No transfer tests were attempted. 
