Dobsonflies and Fishflies - Corydalidae

Members of the family Corydalidae are similar to the Sialidae and are usually found in the same locales. They are considerably larger than the Sialidae, however, and in a number of species commonly known as Dobsonflies the males display exceptionally long, crossed mandibles. In some species of corydalids, the wings are completely clear, while others have very dark wings that are punctuated with occasional clear patches.

Dobsonflies are easily the largest members of the Corydalidae, often boasting broad wingspreads of as much as five inches or more. The larvae of the Dobsonfly Corydalus comutus are known as hellgrammites, and are a popular bait used by fishermen. These larvae are found under stones in swift flowing rivers, where they live for almost three years before pupating. The larvae feed on various aquatic organisms including young mayflies and stoneflies.

Fishflies are smaller species of corydalids. The adults are sluggish and dull-colored. Representative genera include Chauliodes and Nigronia.



INDEX : Insects     September 16, 2008 01:20:18 PM