264 APHIDS OF THE ROCKY MOUNTAIN REGION 
Ovipara. Apterous. Same as apterous vivipara except hind tibia the proximal half of 
which is moderately swollen and bearing numerous rather large sensoria. Hairs on cauda may 
all be simple. 
Male. Alate. Reddish to blackish brown. Otherwise as in alate vivipara except as 
figured. 
Collections. On leaves of Chrysothamnus nauseosus subspp. graveolens and 
nauseosus, C. parryi, C. viscidiflorus and C. plattensis. Throughout region. Ap- 
terous summer viviparae May 17 to Nov. 12, alate viviparae May 31, sexuales 
Oct. 3 to Nov. 29; rather common. Satie tak). 
(FO - 
Body® Hair} 
e 
as 8 | 
= (42>. 
Cotypes. U.S.N.M. and Colo. and Utah Agr. Exp. Sta., Univ. of Minn. and 
Knowlton Collections. 
Chief Distinguishing Characters. Presence of about 3 spatulate hairs on 
cauda, sessile funnel-shaped hairs, which are numerous over entire dorsum, 
slightly clavate, short cornicle and short, acute rostral IV+V (.09) bearing long 
hairs but not with ventrally needlelike tip. 
Capitophorus packi (Knowlton) n. comb. 
Macrosiphum packi Knowlton, 1928b:169 and 1928d:81; Gillette and Palmer, 1934:191. 
Apterous Summer Vivipara. Apple-green to yellow, without markings; appearing frosted 
due to pale funnel-shaped hairs; cauda and anal plate pale; tibiae dusky especially at tips; 
cornicle except at base, antenna beyond base of III, tarsi and rostral IV+V black. Body 
length 3-3.45; hind tibia 1.5-2; hind tarsal II .16-.19; antenna 3.80-4.50; rostrum acute but not 
with needlelike tip, attaining 2d coxa. Hairs on vertex slightly capitate; on III and hind tibia 
blunt, on dorsum of body funnel-shaped, sessile on tubercles, numerous, .02-.025 long on side 
of abdomen. Cornicle slightly clavate at tip, often curved, slender, imbricated. Cauda taper- 
ing to spatulate, with slight neck and bearing 3-5 pairs of lateral hairs and a single dorsal 
preapical one. 
Apt. , 
; ti oo} iow = er ee oe * 
viv. BO -\95, Sen. 2 =9Q) Sa-1 J) ; 
1g a bak = 3 
© | 2 ge. 
WN ; : E on on su oe ae 
= 270A Sk 
= Csen.9 ae a 5 Tecate abaomen yf ARN 
4late 5.87 (Se.9-I15) THAN 86-10 5: 
Viv. 
MG PDs 5 as 
HaTi So SSP SOLO SSCS Hd. Tiss E 
g I <eg S RI EN ee 6 ae SS ee ee eee 
1Asy-70 —~ Ha. Ti. Pm : & 
Fig. 316. Capitophorus packi 
Alate Vivipara. Head and thorax yellow-brown; abdomen yellowish olive-green; entire 
body appearing frosted. Otherwise as in apterous vivipara except as follows: Body length 
1.60-2; rostrum hardly attaining 2d coxa. Veins of wings rather heavy and slightly bordered. 
Ovipara. Apterous. Olive-green with yellow area about base of each cornicle; antenna 
beyond base of III, cornicle except at base, rostral IV+V, tarsi and swollen portion of hind 
tibia black; tips of tibiae brown; cauda and anal plate pale or slightly dusky. Body length 
2-2.5; hind tibia 1.15-1.70; antenna 4; cornicle .60-.70; cauda .28 on median line and broad at 
base. Proximal half of hind tibia swollen to twice diameter of narrowest portion and rather 
thickly covered with sensoria. 
