SUBFAMILY APHINAE 257 
Ovipara. Apterous. Color as in apterous summer vivipara. Body length 1.30-1.40; an- 
tenna .80-1; hind tibia swollen over most of length and thickly covered with numerous sen- 
soria. 
Male. Alate. Color as in alate vivipara except dorsal patch on abdomen replaced by 
short dorsal bands on each segment. Body length 1.30; antenna 1.60-1.80; sensoria present on 
III usually on IV and always on V; cornicle .20-.23. 
Egg. Newly laid, pale yellowish green; later, black. Size .62 by .29. 
Collections. On leaves and stems of rose. Colorado: Fort Collins, Boulder 
and Manitou. Utah: Throughout northern part of state. Fundatrices May 24, 
apterous summer viviparae April 14 to Oct. 31, alate viviparae May 21 to Nov. 1, 
sexuales Sept. 29 to Nov. 5; fairly common. 
Migration of numerous alate viviparae from rose to strawberry and their 
abundant reproduction on the latter was observed. 
On Potentilla the specimens (viviparae) differ in somewhat shorter an- 
tennal segments (III .30-.55, IV .17-.26, V .17-.27, VI .10-.12-+.42-.62) excepting 
unguis which usually exceeds length of III while III exceeds unguis in the rose 
form. 
Collections. On Potentilla sp., on leaves and stems. Colorado: Boulder, Fort 
Collins and Poudre Canyon. Apterous viviparae June 1 to Aug. 3, alate vivi- 
parae June 19 to Aug. 3; not rare. 
Type specimens (8 apterous and one alate viviparae) taken on strawberry 
Dec. 17 at Jerome, Arizona, show shorter measurements than the Colorado 
specimens from rose or even strawberry but the larger ones agree with the 
smaller individuals from Potentilla. Measurements are as follows: Apterous 
Vivipara. Body length 1.1-1.25; antenna 1.2, III .26-.30, IV .18-.21, V .17-.19, VI 
.09-.11+-.30-.45; cornicle .27-.33; cauda .07-.08 on median line, .09-.10 entire 
length; hind tibia .53-.65. Alate Vivipara. Body length 1.25; antennal III .40, 
IV .23, V .22, VI .11+.47, sensoria 28 on III, 5 on IV; cornicle .26; cauda .09 for 
entire length. These measurements agree very closely with those given for C. 
fragariae Theobald by Hodson (1937:409). 
Our forms on Potentilla, wild rose and strawberry (Fragaria sp.) seem to 
agree except slight and rather unstable differences in length and proportions 
of antennal segments and cornicles; however intergrading forms occur so that 
no definite line of distinction can be drawn. Hodson (op. cit.) considers Cock- 
erell’s species distinct from C. potentillae (Walker) and feels confirmed in his 
conclusion after examining specimens sent him but Essig (in correspondence) 
after also studying the same specimens states that he is not convinced of any 
significant difference. Though the differences given seem slight and uncertain 
it seems best, for the present, to treat the American form as distinct. 
This species is distinguished from C. minor chiefly by the conspicuous 
capitate hairs, especially in apterae on antennal I, II and III and on entire dor- 
sum of body. Forbes species shows conspicuous capitate hairs only on anterior 
and posterior portions of body and not on antenna. 
Capitophorus gnaphalodes Palmer 
Capitophorus gnaphalodes Palmer, 1938:356. 
Apterous Summer Vivipara. Entire dorsum pale green; appearing frosted due to capitate 
hairs; antenna dusky beyond base of III, tibiae pale brownish with tips and tarsi blackish; 
cornicle pale with brownish tip; cauda pale. Body length 1.30-1.80 long; width across eyes .43; 
antenna 2.40-2.80; hind tibia 1.03-1.30; rostrum surpassing 2d coxa. Cauda tapering, acute to 
nearly spatulate, bearing 2 pairs of lateral hairs and a single dorsal preapical one. Cornicle 
slightly clavate. 
Collections. On Artemisia ludoviciana subsp. typica on underside of leaves, 
not curling leaves. Colorado: Pingree Park. Apterous viviparae Aug. 21 to 26. 
