Cylindrical Bark Beetlesnot illus

Family Colydiidae

Identification: Usually slender and elongate to very elongate, narrow, paralleL-sided, rarely oval and flattened. Antennal club 2- or 3-segmented. Black or brown. Pronotum often with ridges or grooves. Tarsi usually 4-4-4, rarely 3-3-3. 1-18 (mostly 1-8) mm.


Many colydiids are predaceous on wood-boring insects and are found under bark and jn infested wood. Some are plant feeders and live in shelf fungi, vegetable detritus, or in ant nests. Larvae of a few species are ectoparasites of wood-boring larvae; such parasitic habits are rare among beetles. Few of the 102 N. American species are common.

ANTLIKE FLOWER BEETLES Family Anthicidae Identification: Shape distinctive: body antlike, FW elongate-oval, pronotum distinctly narrower, often rounded, head oval. Pronotum often with a hornlike process extending forward over head. Antennae threadlike, beadlike, or clubbed. Abdomen 5-segmented. Usually black or brown, often with red or yellow. Tarsi 5-5-4. 2-12 mm.

These beetles are common on flowers and foliage as well as on the ground. Many species possess a distinctive hornlike process on the pronotum. Larvae feed chiefly on vegetable detritus; at least 1 species is predaceous. This group is of moderate size, with 188 N. American species.

ANTLIKE LEAF BEETLES Family Euglenidae Not illus. Identification: Similar to Anthicidae, but abdomen 4-segmented and eyes notched. Black to reddish yellow. Hind femora or antennae often modified. 1.5-3.0 mm.

These beetles are principally eastern in distribution and are found on foliage or flowers. They are not common and their habits are poorly known.


Family Mycetophagidae Identification: Elongate-oblong, hairy or pubescent. Black or

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