SUBFAMILY APHINAE 7 
Alate Vivipara. Light green; mottled with dark olive-green with black lateral spots on 
abdominal I to VI inclusive and dusky dashes on segments VI, VII and VIII; rostrum, corn- 
icle, cauda and anal and genital plates dusky; appendages brownish to black. Same in measure- 
ments as aptera except as follows: Antenna 1,2, secondary sensoria convex, hardly tuberculate. 
Hairs pointed, drooping; rather sparse on body. Cornicle cylindrical or slightly tapering, with 
distinct flange and imbricated. Cauda blunt, parallel-sided with slight neck, bearing 5-6 
lateral hairs and a single dorsal preapical one. Lateral tubercles developed on prothorax and 
abdominal I and VII, 
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Fig. 176. Aphis neomexicana 
Collections. On leaves and stems of Ribes leptanthum and R. aureum not 
curling leaves, on Ribes inebrians curling leaves tightly. Colorado: Fort Collins, 
Boulder, Hot Springs, Poudre Canyon and Rocky Mountain National Park. 
New Mexico: Las Vegas. Utah: Provo, Springville, Hooper, Plain City and 
Summit. Apterous summer viviparae May 25 to June 26, alate viviparae May 
25 to July 8; apparently rare. 
Cotypes. U.S.N.M. 
Chief Distinguishing Characters. Length of cornicle (.24-.30 in alate vivi- 
para equalling either III or unguis, in aptera .30-.33 about 1.5 times either II 
or unguis), hairs on cauda 6-7 lateral pairs, length of rostral IV+V (.13-.15) 
longer than hind tarsal II, and hairs sparse on antenna and not longer than 
diameter of III or of hind tibia. 
This species is doubtfully distinct from A. varians which may be synonym 
of A. oenotherae, differing only as follows: Slightly shorter hairs on III and 
hind tibia (in varians never shorter and usually longer than diameter of seg- 
ment bearing them), usual absence of sensoria on V in alate vivipara and not 
causing leaves to curl except on Ribes inebrians. The original description 
states the tibiae of the aptera to be “bristly.” However, study of cotype speci- 
mens shows them to be decidedly less bristly than those of A. varians. 
These points, however, need further biological investigation and host 
plant transfer tests to Epilobium. 
Aphis nigragregalis Knowlton 
Aphis nigragregalis Knowlton, 1935c:137 and 1941b:44. 
Detailed description and drawings of this species seem to be unnecessary 
since it differs only slightly from A. gregalis and A. ornata. These differences 
according to Knowlton are as follows: Conspicuously black body, tinged with 
greenish or bluish in the alate vivipara, and slightly pruinose; mottled and 
banded in aptera; all appendages black, distortion of foliage (which is not 
recorded for ornata) and host plant (a different species of host from that for 
ornata). 
Both nigragregalis and ornata are probably but variations of A. gregalis. 
Collections. On Chrysothamnus nauseosus subsp. nauseosus and C. sp., 
attacking and distorting leaves and tender stems of twigs. Utah: Many locali- 
ties in northern part of state and Upper Sigurd Creek. Apterous and alate 
summer viviparae June 21 to Sept. 2; not rare. 
Cotypes. Knowlton Collection. 
