Dimorphic Sessile Apterae of the Aphid Neothoracaphis glaucae (Hemiptera) on the Evergreen Oak Quercus glauca

Figure 1

Neothoracaphis glaucae on the undersides of leaves of Quercus glauca found in Shinkiba, Tokyo, Japan: (a) an L-type apterous adult (20 January 2014); (b) two S-type apterous adults (20 January 2014); (c) a fourth-instar nymph to be alate (20 November 2013); (d) a teneral alate sexupara with a cast-off skin (20 November 2013).

(a)

(b)

(c)

(d)