240 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Vivipara. ‘‘Dark.’’ (Mounted on slide), pale except the following which are 
slightly dusky to black: Head, thorax, appendages, cauda, cornicle and tip of rostrum. Body 
length 1.8-2.5; across eyes .45-.50; antenna 2.43-3.26; hind tibia 1.60-2.10; rostral IV+V .14-.16, 
attaining 2d coxa. Cauda with slight neck, then tapering, bearing 3 pairs of lateral hairs and 
2 dorsal ones. : 
Collections. On yellow and black currant (Ribes aureum and R. nigrum), 
and on Polygonum persicaria (accidental?). Utah: Kaysville, Fielding, Provi- 
dence and Nibley. Alate viviparae June 9, Sept. 3 and 19; rare. 
Chief Distinguishing Characters. Number of sensoria (on III more than 45, 
on IV 3-11) in alate vivipara, sculpture of cornicle (faintly imbricated), slender 
shape and dark color of cornicle and legs. 
Amphorophora osborni Knowlton 
Amphorophora osborn: Knowlton, 1942c:143; Knowlton and Allen, 1945a:112. 
This species agrees very closely with A. ribiella, judging from study of the 
type, a single apterous vivipara (apparently the only specimen taken) differing 
only in the larger number of sensoria “36-37” on III of aptera. The longer 
measurements of cornicle mentioned in original description were not evident 
in the type specimen. The number of sensoria on III of the apterous vivipara is 
a very variable character so this alone and on a single specimen found with 
typical individuals of A. ribiella is, in the mind of the writer, insufficient to 
make certain of distinct specific status. The form is at present tentatively left 
distinct awaiting collection of more such specimens together with alate viviparae 
associated in a colony indicating a genetic entity. 
Type. Knowlton Collection. 
Collections. On leaves of Ribes aureum. Utah: Cedar City. A single ap- 
terous vivipara June 15; very rare. 
Amphorophora pawtincae Hottes 
Amphorophora pawtincae Hottes, 1934:5; Palmer, 1936b:742. 
Alate Vivipara. Head, thorax and abdomen light pea-green; ocelli, head and mesonotum 
bordered with brownish; cornicle and appendages light brown, cornicle green at base, brown 
at tip. Body length 3-3.7; antenna 4.4-4.5; hind tibia 3-3.1; rostrum attaining or surpassing 
2d coxa. Cornicle with two rows of very faint transverse reticulations just before flange. 
Cauda tapering, bearing 3 pairs of hairs. 
u 
‘tes 
(95- 1.10) Sen. 24-36 
Vertex Gg TS TS ch So, 
toy ep tnt, (ema ah BN 
‘ 0 1A , U sy eS 
Vibla fee xo fist) 8 
Tibla Se Ta. (79-3) (.80 - .95) a ne 
Fig. 284. Amphorophora pawtincae 
Collections. On leaves, stems and flowers of Primula parryi. Colorado: 
Skyway, Grand Mesa (Mesa Co.). Alate viviparae July 12; rare. 
Type. U.S.N.M. Paratypes, Hottes and Colo. Agr. Exp. Sta. Collections. 
This species appears to be very similar to A. rubi, differing as follows: Ap- 
pendages brownish instead of pale, length of rostral IV+V (.20 instead of .15) 
and number of sensoria on III of alate vivipara (fewer than 40). 
Amphorophora ribiella (Davis) 
The Ornamental Currant Aphid 
Macrosiphum cynosbati Oestlund (misidentification), Davis, 1909a:38. 
Macrosiphum ribiellum Davis, 1919:231, 
Amphorophora ribiella, Gillette and Palmer, 1934:140; Knowlton and Allen, 1945a:114. 
Apterous Summer Vivipara. Pale yellow-green; antenna dusky on I, II and III, tips of 
IV and V and entire VI; legs, cornicle except tip, and cauda pale. Body length 2; hind tibia 
1.5; antenna 2.3-3.1; rostrum surpassing 3d coxa. Hairs slightly capitate or blunt; on side of 
