SUBFAMILY APHINAE 205 
Ovipara. Apterous. Head yellow; body pale greenish yellow with median green stripe 
and traces of dorsolateral stripes; with tufts of waxy threads on ventrolateral portions of 
abdominal III to VII inclusive; antenna pale to IV, dusky on IV through VI; cauda pale; 
cornicle pale with dusky tip; legs pale with tarsi, tips of 1st and 2d and entire 3d tibia 
blackish. Body length 1.30; antenna .90, III .18, IV .10 or IJI+IV (coalesced) .27, V .13, VI 
.08-+.21-.25; hind tarsal II .12; hind tibia distinctly swollen along almost entire length and 
bearing numerous rather large, nearly flat sensoria. 
Male. Alate. Head and thorax brown; abdomen greenish yellow with median dark line 
and crossbands on abdominal VII and VIII; covered with slight powder; cornicle, cauda and 
appendages dark brown to blackish. Body length 1; antenna 1.50, III .40, IV .30, V .26, VI 
.10+.43, secondary sensoria, slightly tuberculate and numerous on III, IV and V; cornicle 
.06; cauda .08. 
Collections. On leaves of plum (Prunus domestica) and apricot (Prunus 
armeniaca) as winter host and in part as summer host and grass (Phrag- 
mites communis) as summer host. Throughout region. Fundatrices in May on 
Prunus, apterous and alate viviparae from May to Nov. on both Prunus and 
grass, sexuales Oct. 1 to Nov. 14 on Prunus; very common and injurious. 
The name Hyalopterus pruni (Geoffroy) (1762) cannot replace H. arundinis 
(Fabricius) because Geoffroy only stated “Aphis pruni Reaumur, 1737 ins. 3:296,” 
and failed to add even one descriptive word;-therefore the name is nomen 
nudum. The name pruni must date from Fabricius 1775, but arundinis has page 
precedence. 
Hyalopterus atriplicis (Linnaeus) 
The Boat Gall Aphid 
Aphis atriplicis Linnaeus, 1761:262; Theobald, 1913a:1. 
Aphis chenopodii Cowen (in Gillette and Baker), 1895:119. 
reetcrue atriplicis, Hayhurst, 1909:88; Theobald, 1927:26; Gillette and Palmer, 
1932b:474. 
Apterous Summer Vivipara. Head brown; rest of body yellowish green, mottled with 
darker green on abdomen; powdery; cauda and cornicle pale to dusky especially at tip; 
appendages pale brownish, darker at tips. Body length 1.60; hind tibia .70-.75; hind tarsal 
II .14; antenna 1; rostrum attaining 2d coxa. 
16-.20 
se 
Fig. 238. Hyalopterus atriplicis 
Alate Vivipara. Head and thorax black; abdomen pea-green, with darker green lateral 
areas and dorsal crossbands; powdery; appendages dusky brown with tarsi and tips of tibiae 
blackish; cornicle, cauda and anal plate slightly dusky. Body length 1.50; hind tibia .93; 
hind tarsal II .15; antenna 1.1-1.2; rostrum attaining halfway between lst and 2d coxae. Hairs 
pointed, sparse; .01 long on hind tibia. Cornicle slightly incrassate, with flange.and smooth, 
same width as hind tibia. Cauda elongate-spoon-shaped with two pairs of lateral and one pair 
of terminal hairs. Lateral tubercles present on prothorax and all abdominal segments. 
Ovipara. Apterous. Pale yellowish green; powdery. Body length 1.80; antenna .70-.86; 
hind tibia distinctly swollen for almost entire length and covered with rather large subcircular 
sensoria. 
Egg. Newly laid, pale yellowish; shining; turning black later. Size .63 by .30. 
Collections. In longitudinally folded leaves of Chenopodium album. 
Throughout region. Fuudatrices May 8 to 24, apterous summer viviparae May 
18 to Aug. 18, alate viviparae May 25 to July 19, oviparae Sept. 30 to Oct. 20; 
very common. 
