Carrion Beetle

truncate, exposing pointed tip of abdomen. Legs long, slender. Antennae clubbed. 2-7 mm.

The members of this small family are found in fungi, dead wood, rotting leaves, and under bark. When disturbed they play dead or run with a characteristic uneven gait. Their habits are not well known.

ROVE BEETLES Family Staphylinidae

Identification: Form often characteristic: nearly always elongate-slender, parallel-sided. FW short and exposing 3 to (often) 5 or 6 abdominal segments. Abdomen flexible, in life often bent upward. Antennae threadlike to clubbed. 1-20 (mostly 1-10) mm.

This is a large family, with nearly 3000 species in the U.S., many very common. Rove beetles occur in a variety of habitats: some larger species are found on carrion, others occur on the ground or under objects, along shores of streams and lakes, under bark, in fungi, on flowers, in ant and termite nests, or in decaying vegetable matter. They often run fast, usually with tip of the abdomen bent upward, and are good fliers. The hind wings when not in use are tucked under the short elytra (front wings) with aid of the abdomen. The beginning collector may be rather wary of these beetles because of their habit of holding the abdomen as if they were about to sting. Actually, none can sting but some of the larger species bite readily when handled. Most adults and larvae are predaceous on insects; some feed on decaying organic matter, and a few are parasitic.

SHORT-WINGED MOLD BEETLES Family Pselaphidae Identification: Similar to rove beetles, but with abdomen wider than pronotum and head. Chestnut-brown to dark brown. Maxillary palps often with segments enlarged. 0.5-5.5 mm.

This is a fairly large group whose members are found under bark, in or under rotting logs, in moss, on the ground, and in ant nests. They apparently feed on mold.

ANT-LOVING BEETLES Family Clavigeridae Not illus.

Identification: Similar to Pselaphidae, but antennae with only 2 or 3 segments. Head and pronotum slender. Eyes present or absent. Tarsi with a single claw. Brownish yellow. 1.8-2.5 mm.

Only 9 species occur in the U.S., and all are found in ant nests. They are fed by the ants, which in turn feed on a substance secreted by the beetles.

FRINGE-WINGED BEETLES Family Clambidae Not illus. Identification: Broadly oval, convex. Capable of partially rolling into a ball. Hind coxae expanded. HW with a fringe of long hairs. Antennae clubbed. Tarsi 4-4-4. About 1 mm.

Most of our 9 species of clambids live in decaying vegetable

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