156 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Summer Vivipara. Head and thorax black; abdomen dark olive-green without 
markings; antenna, except base of III, cornicle and cauda dusky; legs pale brownish with 
tarsi and tips of tibiae black. Body length 1.30-1.60; hind tibia .70-.90; antenna 1.10; rostrum 
obtuse, attaining beyond 3d coxa. Hairs on hind tibia nearly erect, longer than diameter of 
tibia. Lateral tubercles rather large. Cornicle cylindrical or slightly tapering, with slight 
flange; cauda bluntly tapering, nearly as broad as long. 
Ovipara. Apterous. Brownish olive-green, yellowish to golden on middle of dorsum 
due to eggs showing through body wall. Body length .9-1.15; antenna .55-.75; hind tibia 
.40-.55; not perceptibly swollen and bearing about 3 sensoria; rostrum attaining abdomen. 
Male. Apterous. Olive-brown; with appendages light yellowish brown. Length 1; hind 
tibia .43; antenna .70-.83, 
Egg. Newly laid, golden brownish yellow; later, shining black. Size .60 by .26. 
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a Tin. 
: Gen.o-8) 
“Boté 16 
Fig. 175. Aphis neogillettei 
Collections. On leaves of Cornus stolonifera which it causes to curl very 
badly. Colorado: Boulder and Fort Collins. Utah: Logan, Morgan and Swan 
Creek. Fundatrices May 1 to 3, apterous summer viviparae June 16 into Aug., 
apterous sexuparae (?) Aug. 19 to Oct. 2, alate viviparae late May to July 1, 
sexuales Sept. 3 to Oct. 6, eggs laid on twigs, in the axils of leaves and around 
the buds beginning Sept. 18; rare but infestations may be heavy where oc- 
curring. 
Type. U.S.N.M., No. 52348. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Dark green body, short cauda with only 
3 pairs of lateral hairs, large lateral tubercles, scarcity of alate viviparae except 
from late May to late June and bristly, erect hairs on antenna and hind tibia, 
longer than diameter of III or hind tibia. 
From A. cornifoliae this species differs in the greatest number of sensoria 
on III of alate vivipara (more than 8) and the color of body in viviparae (not 
brown). 
From A. helianthi, with which it has been confused, this form differs as 
follows: Longer more erect hairs on III and hind tibia, shorter measurements 
in all parts, coalesced condition of antennal III and IV in sexuparae (?), ap- 
terous form of male, hind tibia of ovipara not noticeably swollen and bearing 
very few sensoria instead of many and time of egg-laying (beginning in early 
September and reaching its height when the fall migrants of A. helianthi are 
just arriving to deposit the oviparae). 
Aphis neomexicana (Cockerell) 
The New Mexico Gooseberry Aphid 
Myzus neomexicana Cockerell, 1901:227. 
Aphis neomexicana Gillette and Palmer, 1932b:423; Allen and Knowlton, 1939:126. 
Apterous Summer Vivipara. Light green; cornicle, cauda, and appendages pale with tips 
of segments dark; tarsi black; rostrum, anal and genital plates and sometimes cauda, dusky. 
Body length 1-2.2; hind tibia .8-.9; antenna .9-1.1; rostrum hairy, attaining or slightly sur- 
passing 2d coxa. 
