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.

ANTLIKE FLOWER & LEAF BEETLES, ETC. 181

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.

HAIRY FUNGUS BEETLES Not illus.

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

0 0

Post a comment