SYSTEMATIC TREATMENT OF APHID GENERA
(in alphabetical order)
agrifoliae (Ferris) Anholocyclic,
feeding throughout the year on young branches and along petioles and mid-ribs
of evergreen oak leaves (Takahashi 1958b, as Atarsaphis quercus).
Apterae in life are dark purplish brown; BL c. 0.6 mm. Developmental
stages were fully described by Sorin (1961).
Apparently no alate morphs or sexuales are ever produced. Q.
agrifoliae is only found on Quercus
Quadrartus yoshinomayai Monzen Galls on twigs of Distylium racemosum are closed, pouch-like, maximum diameter 2-4 cm, with numerous wart-like protruberances; greenish, becoming brown when mature, thick-walled, clothed with short hairs (Sorin 2001). The galls are initiated in early April by first-instar fundatrix nymphs that hatched from eggs in autumn and overwintered as nymphs, and they take a year to develop to maturity (Uematsu & Shibao 2013). Emigrant alatae emerge in April of the following year from holes at apices of protruberances, flying to Quercus acutissima, where their progeny feed along leaf mid-ribs and on young shoots (Monzen 1954, Takahashi 1962, Sorin 2001). The emigrant alatae have 4-segmented antennae with secondary rhinaria distributed III 22-27, IV 3-5, hyaline wings, yellowish green abdomen, and BL 1.6-2.0 mm. Sorin (1987) illustrated an embryo from an emigrant alata. Adult apterae on Quercus are yellowish brown to brown, secreting greyish needle-like wax; BL c. 0.7 mm. The return migration to Distylium probably takes place in July to October of the following year, after 4 generations on Quercus (Sorin 2001), so that the complete life cycle may take three years (Uematsu & Shibao 2013). Defense of the galls on Distylium by 1st instars was studied by Uematsu et al. (2007).
One species on Dalbergia closely related to Tinocallis but without lateral displacement of spinal hairs on abdominal tergites 3 and 5. It was restored to full generic status by Quednau (2003).
Alatae are yellowish-white with banded antennae and a dark spot at the
base of the pterostigma; BL 1.6-2.1 mm. Described from an unidentified plant
One or two east Asian oak-feeding species with small, flattened aptera having an oddly irregular shape. Alatae of the type species have an unbranched media in the forewing and a hindwing without any oblique veins. Qiao et al. (2018) reviewed and keyed the species.
chui Zhang Apterae
are unknown. Alatae collected on an unidentified Quercus sp. in
tuberculata (Takahashi) (fig. 91J)
are yellow to white, not strongly sclerotised, very variable in shape with
legs concealed beneath body; BL c. 0.5 mm.
On undersides of leaves of Quercus
gilva, feeding along the veins, in