SUBFAMILY APHINAE | 195 
Ovipara. Apterous. Pale yellowish or clay-color; with blackish patches or bands on 
entire dorsum; appendages and cornicle pale except tips. Body length 1.35-1.9; across eyes 
.45-.49; antenna .57-.70; hind tibia .55-.65, swollen slightly on middle portion and bearing 
numerous rather large sensoria. 
Male. Apterous. Entire dorsum blackish, appendages and cornicle as in ovipara. Body 
length 1-1.1; across eyes .35-.40; antenna .57-.70; hind tibia .50-.55; rostrum as in ovipara. 
Egg. Greenish when newly laid; later, black. 
Co. 
09-13 16" eye A: 
- 0 EM 7O 
Ud dy 7 
.09-.10 
Fig. 225. Brevicoryne fraterna 
Collections. On leaves and tender twigs of willow (Salix sp.). Utah: Mouth 
of Logan Canyon. Colorado: Fort Collins. Apterous summer viviparae April 29 
to July 22; sexuales Oct. 19 to 25; rare. 
Chief Distinguishing Characters. Size of body (shorter than 2), short an- 
tenna (shorter than .75 and much shorter than body) and number of sensoria 
on III in alate vivipara (about 3). 
Type. Ill. Nat. Hist. Surv. Collection. Paratypes, L. G. Strom Collection. 
Brevicoryne symphoricarpi (Thomas) 
The Snowberry Aphid 
Aphis symphoricarpi Thomas, 1877:12; Hottes and Frison, 1931a:438 (synonymy). 
Aphis albipes Oestlund, 1887 :52. 
Brevicoryne symphoricarp!i, Gillette and Palmer, 1932b:464. 
Fundatrix. Medium or brownish green; head and areas about cornicles brownish; appen- 
dages and cauda mostly pale; cornicle blackish. Size 2.50-2.70 by 2; hind tibia .78; antenna 
.60-1.10, six-segmented. 
Apterous Summer Vivipara. Young Fundatrigenia. Newborn, pale yellow; with orange 
about base of each cornicle and brownish on head; appendages and cornicle pale. Adult. 
Black or dusky green with powdery white cross dashes on abdominal I, IV, V and VIII; 
appendages mostly pale; cauda dusky; cornicle and anal plate black. Dorsum of body reticu- 
lated. Body length 2-2.8*; hind tibia 1.2; antenna 2.4. 
Fig. 226. Brevicoryne symphoricarpi 
Alate Vivipara. Head and thorax brownish black; abdomen dusky green with black 
dorsal bands; antenna and cornicle blackish; cauda pale to dusky; legs mostly pale with 
tarsi and tips of tibiae black. Body length 1.5-2; hind tibia 1.2; antenna 1.6-2, secondary 
sensoria tuberculate, with broad margins; rostral IV-+V.13, hardly attaining 2d coxa. Other 
measurements as in apterous vivipara. Hairs on anterma sparse and inconspicuous. Cornicle 
slightly swollen, with indistinct flange; imbricated. Cauda elongate-tapering, with but slight 
tendency to constriction near base, bearing 4-5 hairs on each side. Lateral tubercles well 
developed. 
Ovipara. Nymph. Head dusky brown, rest of body yellow-brown; marked with powdery 
white on dorsolateral crossbands on abdominal I and IV and bands on VII and VIII; appen- 
*One collection of over 12 apterous viviparae taken Aug. 31 measure only 1. No dif- 
ference in structural characters has been detected. 
