254 APHIDS OF THE RoCKy MOUNTAIN REGION 
length 3-‘‘3.2”; across eyes .60; antenna over 3; hind tibia 2.55; rostrum attaining beyond 2d 
coxa. Hairs globate on vertex, body, antenna and cornicle; slightly capitate on legs and blunt 
on cauda. Cornicle slightly clavate, lightly imbricated and bearing about 5 capitate hairs. 
Collections. On wild geranium (Geranium sp.). Colorado: Mesa Lake. 
Utah: Logan Canyon. Apterous viviparae May 31 and July 15; rare. 
Type. Knowlton Collection. 
Chief Distinguishing Characters. Character of the hairs (globate or capitate 
throughout, even on the cornicle and blunt to capitate on the cauda) and’ 
rather long and broad rostral IV+V. 
Capitophorus decampus Knowlton and Smith 
Capitophorus decampus Knowlton and Smith, 1936e:230. 
Apterous Vivipara. ‘‘Bluish green to apple-green with whitish cast’? due to numerous 
funnel-shaped hairs; appendages pale except tarsi, tips of tibiae, of rostrum and antenna 
beyond middle of V which are blackish. Body length ‘‘1’’-1.4-1.6; across eyes .37-.40; antenna 
1.75-1.90; hind tibia .62-.75; rostrum with needlelike tip, attaining between 2d and 3d coxae. 
Hairs on vertex slender, funnel-shaped with stalk; on occiput the same but becoming sessile; 
on antennal I and II short and inconspicuous, blunt to slightly enlarged at tip, reclinate; on 
III blunt, .01 long, reclinate and sparse; on body funnel-shaped with slight stalk to sessile; 
on hind tibia, on proximal half, reclinate, blunt and .01 long, on distal half semi-erect, nearly 
pointed .02 long. Cornicle slender, with tendency to clavate shape. Cauda tapering, bearing 
2 pairs of lateral hairs and a single dorsal preapical one. 
Apt Viv. LDL TS nO wearer abc ae ? 
7q “ e . om ” vy - (0) -.66" 
r 40-.45~"55" Seni 28 ~.35 2 oats a ies R 
gai Body Hairs Sees =H) 
’ yeu 10-12 fl 14 
x120 ot) =<) 30-39 -"44 Hd.Tib. Hd.Ta. 
Fig. 301. Capitophorus decampus 
Collections. On Artemisia tridentata and A. vulgaris. Utah: Blacksmith 
Fork Canyon, Brigham, Collinston, Honeyville, Logan and Emery. Apterous 
summer viviparae April 28 to Oct. 12. 
Type and Paratypes. Knowlton Collection. Paratypes, also Colo. Agr. Exp. 
Sta. Collection. | 
Chief Distinguishing Characters. Pale green body and appendages, rela- 
tively short unguis (not greatly exceeding III and shorter than 6 times base of 
VI), rather short cornicle (shorter than III and about the same as IV), ap- 
proximately clavate shape of cornicle, needlelike tip of the rostrum, length of 
III (exceeding that of IV) and length of V (equalling or exceeding IV). 
Capitophorus elongatus Knowlton 
Capitophorus elongatus Knowlton, 1929b:11; Knowlton, 1935b:283; Gillette and Pal- — 
mer, 1934: 148; Knowlton and Smith, 1936c: 109; Gillette and Palmer. 1936b:747. 
SWIC 7 i mI emeciaaen em 
sen.i-3 .70- 83 °-"L" 
157.25" 
10-22 
eae ANK 
65-80 -".85° 
SEN. 10-16 - 
73 - "8-83" 
em “1.05 - 1.18" 
= "17 
ols) Pt Viv ation CRF aS) 
O15 a R. A a waa 56 -.70 Co. 
Fig. 302. Capitophorus elongatus 
Apterous Summer Vivipara. ‘Shining apple-green.” (Mounted on slide), body pale and 
immaculate; cauda, cornicle, tibiae and antennal I and II and base of III pale; antenna 
beyond base of III, tarsi and tips of tibiae and of rostrum dusky. Body 2-‘'2.6-2.85"; antenna 
about 4; hind tibia 1.25-1.80; rostrum attaining 2d coxa. Cauda tapering to nearly parallel- 
sided, bearing 2 pairs of lateral hairs and a single dorsal preapical one. Cornicle slender, 
hardly clavate but with flange set obliquely. Body hairs infundibulate and numerous. 
