42 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Vivipara. Head and thorax dull black; abdomen blackish brown to dull black, 
marked with broken lines of white secretion on margins of sclerites of thorax and on the ab- 
domen on median line, lateral areas and dorsum of posterior segments; antenna black except 
proximally on III, IV and V; cornicle black; legs black except yellowish portion just beyond 
knees. Length of body 3.8-4; across eyes .72; antenna 1.2; hind tibia 2-2.4. Hairs on hind 
tibia moderately fine, nearly erect. 
Collections. On bark of terminal twigs of Pinus ponderosa var. scopulorum. 
Colorado: Foothills near Boulder. Fundatrices May 2, apterous and alate vivi- 
parae May 20 to July 8; rare. 
Type. U.S.N.M., No. 51417. Paratypes, Colo. Agr. Exp. Sta. and Hille Ris 
Lambers Collections. 
Acknowledgements are‘due to L. F. Byars who collected the specimens 
and contributed them to the collection. 
Chief Distinguishing Characters. Character of the hairs on appendages 
(nearly erect, fine, .05-.08 on III and .07-.10 on hind tibia), length of III (not 
longer than .50, shorter than 3 times rostral IV) and length of rostral IV (.22). 
Cinara pseudotaxifoliae n. sp. 
(Plate I, 8-15) 
Fig. 38. Cinara pseudotaxifoliae 
Lachnus taxifoliae Swain (misidentification), Palmer, 1926:304. 
Cinara taxifoliae (misidentification), Gillette and Palmer, 1931 :872. 
Fundatrix. Same as apterous summer vivipara except in color; pulverulent pattern may 
be more or less lacking in older specimens and antenna and hind tibia may be slightly shorter. 
Apterous Summer Vivipara. Nymph. Pale brownish yellow with two longitudinal rows 
of green spots; somewhat powdery on head and median and intersegmental lines; legs brown- 
ish yellow to dusky. Adult. Dark brown to blackish, becoming yellowish brown on median 
line; pulverulence entirely covering head, prothorax and lateral portions of thoracic segments 
and abdominal II and IV; appendages brownish yellow, with tarsi, knees and almost entire 
hind tibia dusky to black; cornicle black. Body 3 by 1.5-3.5 by 2; hind tibia 2-2.5; hind tarsal 
II .27; antenna 1.1-1.4; cornicle mere rim .01 in height without perceptible cone-shaped base 
though a small surrounding area may be darkened; rostrum attaining abdominal I. Hairs on 
hind tibia fine, numerous, at 35 degrees, length less than diameter of tibia; on body .06 and 
moderately numerous. 
; Alate Vivipara. Head and thorax dark brown; abdomen amber to dusky brown; pulver- 
ulent on median and intersegmental lines and lateral areas. Measurements about same as in 
aptera. Hairs on tibia same length as in aptera but same length as diameter of tibia. Fore 
wing with media twice-forked. 
Ovipara. Color similar to apterous vivipara except abdomen posterior to cornicles heavily 
pulverulent. Size somewhat smaller, body length 2.5; hind tibia with sensoria scattered along 
almost entire length. 
Male. Alate. Color asin alate vivipara. Body length 2; hind tibia 1.5. 
Egg. Black; covered with light pulverulence. Size 1 by .50. 
Collections. On Pseudotsuga taxifolia, on bark of twigs, in colonies; eggs 
on needles laid lengthwise 1-3 together in a row. Colorado: Foothills in Larimer 
