SUBFAMILY APHINAE 149 
Alate Vivipara. Same in color and measurements as aptera or slightly smaller. Veins 
of fore wing rather heavy, stigma dusky yellowish. Sensoria round, flat. Hairs pointed, .03-.04 
long, rather sparse on body; moderately numerous and semierect on appendages, nearly as 
long as diameter of segment bearing them. Cauda bearing 8-10 pairs of lateral hairs. Lateral 
tubercles small but present on prothorax and all abdominal segments. 
Collections. On leaves and stems of Lupinus decumbens. Colorado: Fort 
Collins, Boulder and Stove Prairie (above Bellvue). Utah: Grouse Creek, 
Reserve Creek, Raft River Mountains and Wellesville. Fundatrices May 22, 
apterous summer viviparae May 13 to Aug. 31, alate viviparae May 15 to July 
6; common. 
Type. U.S.N.M., No. 41462. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Peculiar, elongate, pointed shape and 
hairiness of the cauda, rather short unguis (shorter than III and about the 
same length as the cornicle) and the long rostral IV+V (.17, slightly longer 
than hind tarsus). 
Aphis lutescens Monell 
The Oleander and Milkweed Aphid 
Aphis lutescens Monell, 1879:23; Gillette and Palmer, 1932b:411. 
Aphis nerii Boyer de Fonscolombe (?), Thomas, 1879:95; Essig, 1911a:402 and 191l1c: 
530; Gillette and Palmer, 1932b:411. 
Apterous Vivipara. Lemon-yellow on entire body or slightly brownish on head; antenna 
and hind tibia yellowish brown to dusky; blackish on femora, tarsi, distal portion of antenna 
and tips of tibiae; cornicle, cauda and anal plate black. Body length 2.2-3; hind tibia 1.10- 
1.50; antenna 1.50-1.63; rostrum attaining between 2d and 3d coxae. 
yy OBE. 
Cog) ss 
Se ey Ye) 
’ 
Noy aoa 
Fig. 166. Aphis lutescens 
Alate Vivipara. Head and thoracic lobes dark; abdomen bright lemon-yellow; lateral 
areas on abdominal segments and blotch posterior to base of each cornicle dusky to black; 
cauda, anal plate, antenna and cornicle black; tibiae yellowish to dusky with tips and tarsi 
black. Same in measurements as aptera except as figured. Secondary sensoria rather large, 
not tuberculate. Hairs pointed, drooping, about .02 on antennal III; on hind tibia, as long as 
diameter of tibia and rather numerous; .04-.05 on body. Cauda bearing 3 pairs of lateral, 2 
pairs of dorsolateral and one median preapical hairs. Lateral tubercles present on prothorax, 
and abdominal I and VII, but feebly developed. 
Collections. On leaves and stems of Asclepias subverticillata and sp. 
Colorado: Fort Collins, Paonia, Rocky Ford, Fruita, Delta and Grand Junction. 
Apterous summer viviparae Aug. 12 to Oct. 14, alate viviparae Sept. 6 to Oct. 
14; in crowded colonies, fairly common. 
Chief Distinguishing Characters. Large black cauda (1-2 times length of 
hind tarsus), color of body (bright yellow), long black cornicle (as long as 
antennal III), long rostral IV+V (.16-.17) and number of sensoria on III of 
alate vivipara (5-15). 
This species has been considered by several aphidologists to be A. nerii of 
Boyer de Fonscolombe (1841:179) instead of A. lutescens Monell, due to the 
fact that Monell mentioned no black patch at the base of the cornicle and, in 
correspondence, expressed doubt of its presence. However, Boyer also men- 
tions no black patch at base of cornicle. Theobald (1915:129) considers A. nerii 
as lacking said black patch and cauda with only 3-4 pairs of lateral hairs. 
Aphids with the patch and 6-7 lateral hairs on cauda he places as Myzus 
