SUBFAMILY APHINAE 237 
Apterous Summer Vivipara. (Mounted in balsam), body immaculate; entire antenna 
slightly dusky beyond II or base of III; cornicle only slightly dusky, darker at tip; cauda 
and legs pale; rostrum dusky at tip. Body length 1.70; hind tibia 1.2-1.3; hind tarsal II .11; 
antenna 2-2.30; rostrum attaining beyond 2d coxa. Hairs slightly capitate; on side of body .01. 
Cornicle slightly swollen in distal half and with 2-3 rows of loose reticulations or close imbri- 
cations. Cauda elongate-tapering without noticeable constriction near base and bearing three 
lateral pairs of hairs and single dorsal preapical one. 
Alate Vivipara. Same as apterous vivipara except rostrum attaining between lst and 2d 
coxae and differences shown in figure. 
Collections. On leaves of Grindelia squarrosa. Colorado: Fort Collins. 
Utah: Amalga, Garland, Granite and Beaver Dam. Apterous viviparae May 12 
to June 21 and Sept. 29, alate viviparae May 20; rare. 
Cotypes. U.S.N.M., No. 396 and Univ. of Neb. Collection, No. 142. A. aridus, 
Knowlton Collection. 
Chief Distinguishing Characters. Slightly swollen cornicle with slight in- 
definite reticulation, number of sensoria on III of alate vivipara (fewer than 20), 
presence of 4-9 sensoria on III of apterous vivipara, short rostral IV+V (.11, 
hardly as long as base of VI). 
Amphorophora halli Knowlton 
Amphorophora halli Knowlton, 1927:185. 
Alate Vivipara. ‘‘Yellowish green.” (Mounted on slide), antennal VI and distal portions 
of III, IV and V and of cornicle black. Body length 2.35; across eyes .48; antenna about 3; 
hind tibia 1.7; rostrum hardly attaining 2d coxa. Cornicle swollen on distal half to about 
twice the diameter of the proximal portion, smooth and without reticulation. Cauda slender, 
tapering with slight narrowing near base, bearing 2 pairs of lateral hairs and a single dorsal 
preapical one. Hairs very short and inconspicuous. 
70 -~“74" Sen. 19-20 ee 
“a ASR RARER TTI SEIT” 
oeniguaneaecal | 
ie! 1B" 
OSS wre! Bl opines) 
ee 72 278" 
Fig. 279. Amphorophora halli 
Collections. On Betula fontinalis.* Utah: Smithfield Canyon. Alate vivi- 
para Aug. 24; rare. 
Type. Knowlton Collection. 
This species differs from A. nervata only in the more swollen cornicle. 
Amphorophora janesi Knowlton 
Amphorophora janesi Knowlton, 1938a:14. 
Apterous Vivipara. ‘‘Apple-green’’; appendages and cornicle black. Body length 1.6-1.8; 
across eyes .38; hind tibia 1.0-1.2; hind tarsal II .11; antenna 2.2-2.3, III .49-.60, IV .34-.46, 
V .33-.36, VI .12+.65-.67-‘*.70”; cornicle .62-.80; cauda .20 on median line, .25 on side; rostral 
IV+V .10-.12, attaining 2d coxa. Cauda tapering to slightly spoon-shaped, bearing 2 pairs of 
lateral hairs. 
Alate Vivipara. Head and thorax dark; “abdomen apple-green’’; antenna, cornicle and 
tibiae black; cauda pale. Body length 1.9; across eyes .38; hind tibia 1.28; hind tarsal II .11; 
antenna 2.15-‘‘2.25’’, III .51, IV .43, V .40, VI .13-+.55, sensoria 13 on III; cornicle .60; cauda 
.20 on median line, .25 on side; rostrum attaining 2d coxa. 
Collections. Host unknown. Utah: Red Canyon. Alate and apterous vivi- 
parae May 2. 
Type and paratypes. Knowlton Collection. 
This species is very close to A. nervata and is distinguished only by slightly 
shorter measurements and the darker color of the appendages. 
Not figured on account of similarity to A. nervata (Gillette). 
*The host may not certainly be Betula. Since only alate viviparae and apparently 
only a single specimen, were taken, the aphids or aphid might have been accidental. 
