SUBFAMILY APHINAE 185 
Collections. As winter host, on leaves of Viburnum opulus var. sterile, caus- 
ing curling of leaves in spring, (summer host unknown). Throughout region. 
Fundatrices April 1 to June 11, spring migrants (entire progeny of fundatrix) 
May 8 to June 9, fall migrants Sept. 2 to Nov. 3, sexuales Sept. 7 to Nov. 5; quite 
common and troublesome. 
Type. U.S.N.M., No. 42814. Paratypes, Colo. Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Presence of sensoria on the hind tibia of 
alate and apterous viviparae on the primary host, sculpturing of the cornicle 
(fine, crowded, denticulate imbrications), heavy antenna in alata (diameter of 
III rather exceeding that of hind tibia), sudden narrowing of base of VI to form 
the unguis, shape of the cauda (acute, tapering, with 3 pairs of lateral hairs), 
five-segmented antenna of fundatrix and ovipara, long rostral IV-+-V and habit 
of all individuals of the second generation acquiring wings and leaving the 
winter host plant. 
Aphis viburniphila Patch 
The Viburnum Aphid 
Aphis viburniphila Patch, 1917:416; Gillette and Palmer, 1932b:454. 
Apterous Vivipara. Head blackish; rest of body reddish brown mottled with paler shades 
and marked with dusky dorsal bands posterior to cornicles; appendages mostly whitish to 
yellow; cornicle black, cauda and anal plate dusky. Body length 2; hind tibia .95; hind tarsal 
II .12; antenna 1.1-1.5. Hairs rather numerous, erect; .05-.09 on hind tibia. 
Alate Vivipara. Head and thorax brownish black; abdomen reddish brown, sometimes 
green; mottled. Body length 2; hind tibia 1; hind tarsal II .11; antenna 1.3; rostrum attaining 
between 2d and 3d coxae. Cauda parallel-sided te blunt-tapering, not longer than broad, 
bearing about 4 pairs of lateral and 3 pairs of dorsolateral hairs. Lateral tubercles present. 
Hairs pointed, erect, moderately numerous; .05 long on antenna; .05-.07 on hind tibia; .06 on 
body. 
Ovipara. Apterous. Color as in apterous vivipara. Body somewhat pointed posteriorly, 
length 1.55-1.80; antenna 1.10-1.25, usually without secondary sensoria; hind tibia not 
swollen but bearing about 4 flat sensoria on distal third. 
Apt vie : 6 S58 Jon BUG FRIES AS TT fe 
“FS Ca cate 
ge ee 
Ha. We 
oe hae ale 
j r oo 2833S ty et 
ee AREER OS RO eS “ 
Fig. 213. Aphis viburniphila 
Collections. On leaves and stems of Viburnum opulus and var. sterile. Colo- 
rado: Fort Collins, Boulder and Denver. Apterous viviparae May 24 to Oct. 26, 
alate viviparae May 24 to Oct. 17, oviparae Oct. 14; rather common. 
Cotypes. Maine Agr. Exp. Sta. Collection. 
Chief Distinguishing Characters. Long erect hairs, nearly twice as long on 
tibia as diameter of tibia, reddish brown mottled body, short bushy parallel- 
sided to bluntly tapering cauda, frequent presence of numerous sensoria on 
III of apterous vivipara, and presence of rather numerous sensoria (20-28, on III 
- and 5-7 on IV) on antenna of alate vivipara and character of hind tibia of 
ovipara (not noticeably swollen and bearing very few, only 4, sensoria and those 
on distal portion, instead of the usual proximal location). 
