Key B. Aphids on fir (Abies)

Synopsis

B1 (B8) Body, at least in adults, covered with white wax wool, filaments or ribbons; siphunculi absent ................................................................................................................................B2

B2 (B3) On roots, forming colonies embedded in wax wool .............. Prociphilus Koch, 1857 p. 19

B3 (B2) On aerial parts of the tree .................................................................................................B4

B4 (B7) Antennae at most 3-segmented. Scattered on bark or needles .........................................B5

B5 (B6) On needles ......................................................... Adelges (Aphrastasia) Börner, 1909 p. 20

B6 (B5) On bark of stems, branches and twigs ................... Adelges (Dreyfusia) Börner, 1908 p. 20

B7 (B4) Antennae 6-segmented. In colonies between needles of young shoots ................................ ................................................................................................... Mindarus Koch, 1857 p. 21

B8 (B1) Wax, if present, in the form of dusting, siphunculi present ..............................................B9

B9 (B10) Siphunculi present as pores raised on cones ............................... Cinara Curtis, 1835 p. 22

B10 (B9) Siphunculi tubular .......................................................... Elatobium Mordvilko, 1914 p. 23 B1 (B8) Body, at least in adults, covered with white wax wool, filaments or ribbons; siphunculi absent ................................................................................................................................B2

B2 (B3) On roots, forming colonies embedded in wax wool ....................... Prociphilus Koch, 1857