Amphicercidus pulverulens

Amphicercidus pulverulens (Gillette, 1911) Figs 7, 8, 9, 14 D, Table 2 Aphis pulverulens Gillette, 1911: 324. Specimens examined. One alate viviparous female, China: Xizang (Linzhi City; alt. 2000 m), 4.VIII.2014, No. 29606-1-1, on Lonicera, coll. J. Chen and X. C. Zhu; one alate viviparous female (COI: PQ 611218), China: Xizang (Linzhi City), 4.VIII.2014, No. 29606-1-1, on Lonicera, coll. J. Chen and X. C. Zhu; one alate viviparous female, China: Xizang (Linzhi City; alt. 3900 m), 5.VIII.2014, No. 29578-1-1, on Lonicera, coll. J. Chen and X. C. Zhu. Diagnosis. Pronotum and abdominal tergites I-V each with one pair of marginal tubercles (Fig. 8 C); siphunculi short stout cylinder, as long as second hind tarsal segment (Figs 8 D, 9 E), 0.09–0.11 × body length; antennal segment III with 43–46 secondary rhinaria in alatae (Figs 8 B, 9 B); processus terminalis 2.87–3.14 × the base of the last antennal segment. Comment. The species has the shortest siphunculi in the genus and occurs on Symphoricarpos (Caprifoliaceae) in USA and Canada. After checking the syntype USNMENT 00399393.001 of A. pulverulens from the USA (Smithsonian National Museum of Natural History, 2025), it is a new record for Chinese aphid fauna. This is the first record of A. pulverulens on Lonicera (Caprifoliaceae) in China. The species population found in China is very similar to the original description, with siphunculi being short and stout cylinder, as long as second hind tarsal segment, without flange; the Ant. III as long as Ant. III + IV; cauda short and broad. But, the characteristics of this species exhibit some differences between those found in China and the original records. In China, the species is orange in life, with straight siphunculi, whereas in USA, it is dusty green in life, and the siphunculi are weakly curved (Gillette 1911; Oestlund 1923). Biology. The species feeds on the young stems of Symphoricarpos (Caprifoliaceae) in USA and Canada (Gillette 1911; Blackman and Eastop 2024), but this is the first record of it feeding on Lonicera (Caprifoliaceae) in China. Distribution. China (Xizang); USA; Canada.