SUBFAMILY APHINAE 107 
Collections. On roots of Salix sp. Colorado: Fort Collins and Boulder. 
Fundatrices May 17, apterous summer viviparae Sept. 7 to 22, alate viviparae 
Sept. 7, oviparae Sept. 22 to Nov. 5, males Oct. 18 to Nov. 5; apparently rare. 
Type. U.S.N.M., No. 41453. Paratypes, Colo. Agr. Exp. Sta. Collection. 
This species resembles very closely Fullawaya salici-radicis, but differs in 
the presence of a minute cornicle instead of none. 
Pterocomma flocculosa (Weed) n. comb. 
The Flocculent Willow Aphid 
Melanoxanthus flocculosus Weed, 1891:291. 
_ Pterocomma flocculosa, Baker, 1916a: 286. 
Plocamaphis flocculosa, Gillette and Palmer, 1931:929. 
Fundatrix. Same as summer aptera except as follows: Slightly shorter antenna, about 2, 
III .50, IV .30, V .32, VI .20+.32; hind tibia 1.20. 
Apterous Summer Vivipara. Dull yellowish brown with a pair of longitudinal rows of 
black areas; very flocculent; cornicle bright orange; legs light brownish to dusky; tarsi and 
tips of tibiae blackish. Body length 2.5-3.5; hind tibia 2-3; antenna 2.65-3. Hairs as in alate 
vivipara. 
ie} 
» Lateral Ne eres Ta. 
6 A A 
AN Ni Apt Vu Fors ee See! 
Ty aces acetneneuae. 
Fig. 116. Pterocomma flocculosa 
Alate Vivipara. Same color and measurements as apterous vivipara. Wings hyaline, 
except for cubital and anal veins on fore wing which are slightly smoky. Hairs pointed, 
numerous on appendages; on body .05 long and very sparse. Rostral IV+V .11-.13, broad, 
attaining about to 3d coxa. Cornicle swollen and without flange, held against body. Fore wing 
with media twice-forked. 
Ovipara. Apterous. Color as in summer aptera. Body length 4.10, somewhat elongated 
posteriorly; hind tibia 1.5, very slightly swollen on proximal half and bearing a few scattered 
minute sensoria. 
Male. Apterous. Color as in vivipara. Body 2; hind tibia 1.35; antenna 1.90, III .52, 
IV .38, and V .36, each with numerous small sensoria, VI .18+.26. 
Collections. On bark of Salix sp. Colorado: Fort Collins and Eldora. 
Fundatrices April 16, apterous summer viviparae July 16 to Aug. 8, alate vivi- 
parae June 7 to Aug. 8, sexuales Oct. 23; rare. 
Chief Distinguishing Characters. Peculiar shape of the cornicle and cauda 
and abundant flocculence. 
[Genotype Pterocomma pilosa Buckton] 
Pterocomma pilosa Buckton, 1879:143. 
Co. FAR 
Af LOM y (al=apt}] § \ear cAk 
Agi vy : <P Saar Dr So NQ529 Ph bon, aN aN} 
AOKA ra ai22 15 
i Ho Ta, a 
re yy, Dy 
Tae Rit Tel A 
Fig. 117. Pterocomma pilosa 
