SUBFAMILY APHINAE 131 
Apterous Summer Vivipara. Head blackish; body dusky ochre-red or dull blackish green 
with dark bands on abdominal VII and VIII; antenna beyond middle of V, tarsi, tips of 
tibiae, rostral III, IV and V, cornicle, cauda, anal and genital plates dusky to black. Body 
2 by 1.3; hind tibia .85-1; antenna 1.26; rostrum acute, tapering, tip beyond hairs compressed 
laterally, having appearance of distinct segment V, appearing needlelike in ventral aspect, at- 
taining abdominal II or III. Young. Pale greenish yellow with reddish tinge and dusky 
head. 
Alate Vivipara. Head and thorax black; abdomen dull blackish green, darkest on median 
and segmental lines and with black bands on dorsum of abdominal VII and VIII; cornicle, 
cauda, anal and genital plates, antennal I, II and VII and tips of III, IV and V and rostrum 
beyond II dusky to black. Same in measurements as apterous vivipara or with slightly shorter 
cornicle. Cornicle without evident flange, occasionally bearing a hair on distal half. Cauda 
bearing 3-5 hairs on each side and 1-2 dorsally. Lateral tubercles large, present on prothorax 
and abdominal I, II and VII. 
Ovipara. Apterous. Color same as apterous vivipara. Body length 2; antenna 1. Hind 
tibia very slightly swollen along entire length and bearing about 12 inconspicuous sensoria 
along the posterior margin. 
Male. Apterous. Color same as ovipara. Body length 1.25-1.50; hind tibia .70; antenna 1. 
Collections. On leaves and twigs of Chrysothamnus nauseosus subspp. 
graveolens and nauseosus. Colorado: Fort Collins, Bellvue, Pueblo, Eagle, 
Cameron Pass and Meeker. Utah: Numerous localities throughout the state. 
Idaho: Hollister. Apterous summer viviparae May 30 to Sept. 24, alate viviparae 
May 31 to July 10, sexuales Oct. 7 to 29; rather common. 
Type. U.S.N.M., No. 41455. Paratypes, Colo. Agr. Exp. Sta. and Knowlton 
or Utah Agr. Exp. Sta. Collections. 
Chief Distinguishing Characters. Long and acute, needlelike rostral IV+V, 
acute, tapering cauda, peculiar shape of cornicle (slightly narrowed in the 
middle and without flange) and sensoriation of the hind tibia of ovipara. 
Aphis cornifoliae Fitch 
The Dogwood Aphid 
Aphis cornifoliae Fitch, 1851:65; Monell, 1879:25; Davis 1910d:484; Hottes and Fri- 
son, 1931a:189; Gillette and Palmer, 1932b:393. 
Apterous Summer Vivipara. Greerish black, with black bands on abdominal VII and 
VIII; appendages pale to dusky with black on tarsi and tips of tibiae and dusky on antennal 
V and VI; rostrum, cornicle, cauda, anal and genital plates dusky to black. Body .90-1.20; 
hind tibia .60; antenna .90-1.05. Cauda slightly longer than wide; rostrum obtuse, attaining 
3d coxa. Hairs pointed and drooping. Cauda tapering, bearing about 4 hairs on each side. 
Lateral tubercles well developed on prothorax and abdominal I and VII. 
Alate | 2 be fe =—19 CO. 
: Sen. 5-7 13-17 . 
— .. anger 
a DOTOKUTAC ONAL oo UK ODCANRANTD 002000 : 
ps. 24-9 
Fig. 142. Aphis cornifoliae 
Alate Vivipara. Measurements as in aptera except as figured. 
Ovipara. Apterous. Dark greenish black. Body length 1.30; antenna .95; cornicle .21. 
Hind tibia hardly swollen but bearing scattered large flat sensoria. Otherwise as in apterous 
vivipara. 
Male. Apterous. Color same as in ovipara. Body length 1.20; hind tibia .70; cornicle .20. 
Collections.* On leaves and stems of Cornus stolonifera. Colorado: Fort 
Collins and Bellvue. Utah: Ogden Canyon. Idaho: Kimberly. Alate viviparae 
Sept. 10, apterous viviparae May 20 to Oct. 8; sexuales Oct. 8; rare. 
Cotypes. U.S.N.M. 
*Record by Gillette (1910:405 on Ribes aureum) is erroneous, the aphid being Aphis 
helianthi Monell. 
