272 APHIDS OF THE ROCKY MOUNTAIN REGION 
Alate Vivipara. Color about as in apterous vivipara except as follows: Thorax brownish; 
‘antenna beyond proximal fifth of III and distal two-thirds to entire cornicle blackish. Body 
length 2-2.50; across eyes .53; hind tibia 1.80-2.10. Otherwise same as apterous vivipara 
except as figured. 
Ovipara. Apterous. ‘‘Reddish tan and whitish pruinose.’”’ Otherwise about as in apterous 
vivipara except that nearly proximal half of hind tibia is swollen and covered with sensoria 
and cauda and cornicle are slightly shorter. 
Collections. On leaves and stems of Chrysothamnus nauseosus subsp. 
nauseosus. Utah: Brigham Canyon, Logan, Honeyville, Harper, Butlerville, 
Promontory, Cedar Valley, Dunbar and Deweyville. Idaho: Preston. Fund- 
atrices May 29, apterous summer viviparae “May to mid-October,” alate vivi- 
parae July 21 to Sept. 27, oviparae Oct. 3; apparently rather common. 
Type and Paratypes. Knowlton Collection. Paratypes, Colo. Agr. Exp. Sta. 
Collection. 
Chief Distinguishing Characters. Slightly capitate hairs on the vertex of 
both alata and aptera and body of alate vivipara, with rather sessile funnel- 
shaped ones on body of aptera and rather broad, somewhat spatulate cauda, 
bearing 6-7 hairs on each side. 
” 
Capitophorus utensis Pack and Knowlton 
Capitophorus utensus Pack and Knowlton, 1929:201; Knowlton and Smith 1936c:112. 
Apterous Summer Vivipara. ‘‘Green.’’ (Mounted on slide), immaculate with tibiae and 
cauda slightly dusky; cornicle, antenna, tarsi and tips of tibiae black. Body length 1.10-1.7- 
“1.9”: across eyes .40-.48; antenna about 2-2,.25; hind tibia .77-.95; rostrum hardly attaining 
2d coxa. Cornicle slightly clavate, tip oblique. Cauda tapering and blunt. 
BAPEAAT ALAA Oe - 
x .30 ~ 40 HOS 
sen. i-? .32-.45 itd.Ta, 
Hair 9 R, 
=) Cin OE) ice 
7 30-38 ae 
A7—.55 40 — 4? 
Fig. 327. Capitophorus utensis 
Alate Vivipara. ‘‘Dark green with black lateral areas on abdomen; cornicle black; cauda 
pale; veins dusky.”’ Body length 1.55-1.70; antenna 2.2-2.6; rostrum hardly attaining 2d coxa.” 
Collections. On Gutierrezia sarothrae and Chrysothamnus viscidiflorus 
subsp. stenophyllus. Utah: Throughout state. Idaho: Dayton. Apterous vivi- 
parae June 7 to Aug. 13, alate viviparae June 7 and 9; not very common. 
Type. Knowlton Collection. Paratypes, U.S.N.M. and Utah Agr. Exp. Sta. 
Collection. 
Chief Distinguishing Characters. Minute infundibulate hairs on vertex and 
body, hairs of the cauda which consist of only 2 lateral hairs and a single 
slenderly spatulate preapical hair, black cornicle and blunt, broad rostral IV-+-V. 
Capitophorus wasatchii Knowlton 
Capitophorus wasatchii Knowlton, 1927d:238 and 1936c:112; Gillette and Palmer, 
1934:157. 
Apterous Summer Vivipara. Pale green, appearing frosted due to capitate hairs; antenna 
dusky distally, often all beyond II; cauda, cornicle and legs pale to slightly dusky with tarsi 
black and tips of tibiae dark. Body length 1.75-2; across eyes .47-.50; hind tibia .95-1.05; 
hind tarsal II .13-.14; antenna 2.40-2.70; rostrum acute but not needlelike at tip, surpassing 
2d coxa. Hairs on vertex funnel-shaped with slight shaft, on dorsum of body sessile, .02-.03 
long and numerous; on antenna and hind tibia blunt to slightly capitate; on venter of ‘ab- 
domen mostly simple. 
Alate Vivipara. (Mounted on slide), body immaculate; color of appendages as in apter- 
ous vivipara. Body length 1.80; antenna 2.80; hind tibia 1.20. Hairs as in aptera or slightly 
shorter. 
Ovipara. Apterous. Color and measurements as in apterous vivipara except that some 
examples are brown and proximal half of hind tibia is more or less swollen and bearing 
rather numerous moderately large sensoria. * 
Male. Alate. Antennal measurements about as in apterous ovipara and vivipara. 
