Tentativo di identificazione di Aphididae , Natura Mediterraneo

Aphis rumicis: apterae are coal-black to very dark greenish-brown, with black siphunculi and cauda. Their antennae are pale near their bases, but are darkened from the middle of segment III to their tips (cf. Aphis fabae, which usually have segments III-IV and the base of segment V quite pale). Femora, except at base, tips of tibiae and tarsi are dark. Antennae are 6-segmented, 0.6-0.7 times body with the terminal process 2.0-2.8 times base of antennal segment VI. Secondary rhinaria are absent; longest hair on antennal segment III is 1.1-1.7 times the base of that segment. Rostrum reaches past middle coxae, with apical rostral segment 0.95-1.15 times second hind tarsal segment. The hairs on their hind legs are all much longer than the least width of the tibiae. The abdominal dorsum typically has well marked bands across tergites VI-VIII, especially broad on VI, as well as fragmented bands on tergites I-V (cf. Aphis fabae, which normally only has cross bands on tergites VI-VIII, very small on VI). The siphunculi are 0.11-0.15 times body length, 0.9-1.4 times the length of the cauda. The cauda is tongue-shaped with 12-17 hairs. The body length of adult apterae of Aphis rumicis is 2.05-2.77 mm.

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