161a
(160a). Abdominal sternites freely
movable (%% only; also refer to couplet 182); abdomen
tip exposed
beyond elytra; last tarsal segment elongated, others are short (Figs.A-D) (predators)
…………………………………………………………...............…………(Coleoptera) Rhizophagidae
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A B C D
161b. First 2-4 abdominal sternites somewhat fused or immovable;
eyes usually notched; most
are black or brownish (Figs.A-H) (predators)...................………....(Coleoptera) Tenebrionidae
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A B C D E
F G H