Defensive Nymphs of the Woolly Aphid Thoracaphis kashifolia (Hemiptera) on the Oak Quercus glauca

Figure 4

Forelegs and head of first-instar nymphs of the alate generation: (a) an entire foreleg of a typical defensive nymph, with double-headed white arrows indicating the length and width of a femorotrochanter defined in this paper; (b) fore tarsus of a typical defensive nymph with thick, strongly curved claws; (c) fore tarsus of a nymph produced early in autumn with slender claws; (d) head of a typical defensive nymph (ventral focus) indicating the downward-directed facet (by a white arrow) and the positions of the remaining two facets (by black arrows) of the left triommatidium. Scale bars: 100 μm.

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