266 APHIDS OF THE ROCKY MOUNTAIN REGION 
tarsi, tips of tibiae and of antenna dusky. Body length 1.10; hind tibia .75-.80; hind tarsal II 
-11; antenna 2-2.2; cornicle .40-.50; rostrum attaining between 2d and 3d coxae. Cornicle 
slightly clavate just before tip, imbricated. Cauda tapering, acute, bearing 2 pairs of lateral 
hairs and a single dorsal preapical one. Hairs funnel-shaped on slender stalk on vertex; 
stalked to sessile on body, .03 long; on antenna and hind tibia merely blunt, recumbent. 
Ocular tubercle rudimentary. Lateral tubercles not evident. 
Alate Vivipara. Head, pronotum and abdomen pale green; thorax pale brown; abdomen 
with slightly dusky lateral areas; appendages as in aptera. Body length 1.5; hind tibiia 1-1.15; 
antenna 3. 
Ovipara. Apterous. Greenish to reddish. Measurements about as in apterous vivipara. 
Proximal half of hind tibia very slightly swollen and bearing a few irregular rather scattered 
sensoria. 
Male. Apterous. About same in color as ovipara. Body length 1.22; hind tibia .95; an- 
tenna 2.44; cornicle .35, 
s (8): 
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Bois o Oa gene bos SLE SKdovsal , 
Fig. 318. Capitophorus pe ad a ae 
Egg. Newly laid, pale yellow; later, black, Size .60 by .26. 
Collections. On leaves and stems of Artemisia frigida, A. tridentata and A. 
ludoviciana. Colorado: Fort Collins, Laramie-Poudre Tunnel, Cameron Pass, 
Pingree Park, Estes Park, Bellvue and Boulder. Generally in northern Utah 
and southern Idaho. Fundatrices (?) March 20, apterous summer viviparae 
April 11 to Nov. 30, alate viviparae April 15 to Aug. 14, sexuales Oct. 12 to Nov. 
30; common but difficult to find on account of protective coloration, solitary 
habit and agility in escaping. 
Type. U.S.N.M., No. 59326. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Shape of hairs (funnel-shaped with 
slender stalk), length of antenna (twice as long as body), length of cauda (fourth 
to third of cornicle), length of cornicle (coequal with antennal III and IV), 
shape of cornicle (slightly clavate) and rostrum with needlelike tip. 
This species differs from C. glandulosus (Kaltenbach) (European specimens 
of apterous viviparae determined by Hille Ris Lambers) as follows: Slightly 
smaller size in all measurements, excepting cornicle and unguis, shape of 
rostrum (more slender and in ventral aspect needlelike tip), length of rostral 
IV+V (.11-.12 instead of .10-.11) and length of cornicle (3-4 times length of 
median portion of cauda instead of barely 3 times). The crossbands on-alata 
mentioned by Kaltenbach have not been observed in Colorado examples. 
Capitophorus pullus Gillette and Palmer 
Capitophorus pullus Gillette and Palmer, 1933:353 and 1934:155. 
Alate Vivipara. Head and thorax dark brown to blackish; abdomen medium brown, 
(cleared and mounted on slide), with only traces of dorsal dashes on abdomen; cauda, anal 
and genital plates, and appendages dusky to black; cornicle black; veins of fore wing heavy. 
Body length 2; across eyes .43-.46; hind tibia 1.05-1.18; antenna 1.95-2.05; rostrum acute, tip 
needlelike in ventral aspect, attaining barely to 2d coxa. Cornicle cylindrical or slightly — 
clavate, imbricated. Cauda elongate, tapering, bearing 2-3 pairs of lateral hairs. Hairs on 
vertex pointed to blunt or cylindrical; on occiput and on dorsum of abdomen funnel-shaped, 
sessile on tubercle, .01-.015 long; on venter pointed but with occasional funnel-shaped hair; 
on antenna blunt to pointed, on hind tibia pointed, .02-.04 long; on side of abdomen sessile, 
funnel-shaped to cylindrical, .01-.04 long. Ocular tubercle rudimentary. Terminal pad on 
tibiae very inconspicuous, 
