46a
(45a). Prehensile labium (= lower lip), folded under head
at rest, and when extended much
longer
than head (Figs.A-G) [dragonfly and
damselfly nymphs]..................…................Odonata
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A B C
D
E
F G
46b. Labium normal, not
as previously
described...............................................................……..................
.47
