Couplet 8
8a:
Hind femur and tibia narrow and subcylindrical in cross
section; hind tarsus shorter than tibia and not tapered
distally; body not streamlined, outline of thorax and
elytron discontinuous, base of pronotum distinctly narrower
than elytra; length 11-16 mm
Amphizoidae
p. 405
8 b:
Hind femur and
tibia more or less distinctly compressed, especially in
larger species (length > 6 mm); hind tarsus usually
as long or longer than tibia, distinctly tapering distally;
body streamlined, outline of pronotum and elytron usually
conjointly rounded (Figure 26-20A,C); length 1-40 mm
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