Size
8-40 mm (Nearctic species)
Identification
Adults:
generally medium to very large sized beetles
Eyes unnotched at antennal bases
there is a visible scutellum
males with protarsal segments 1-3 modified to form a large, broad oval palette, often with variable number of suckers on the ventral surface-these are used to grasp the female during mating.
Larvae:
Anterior margin of the clypeus (frontoclypeus) is rounded
anteroventral margin of femur and tibia with a fringe of swimming hairs
both abdominal segments 7 and 8 fringed laterally with swimming hairs
generally large sized
Contributed by
Tim Loh on 8 February, 2009 - 1:12am
Last updated 19 March, 2009 - 5:54pm
