Review of the Hybomitra sonomensis group (diptera : tabanidae) in westernNorth America, with emphasis on geographic variation in adult Hybomitraphaenops [Review]

摘要

The Hybomitra sonomensis group of western North America is reviewed and a key to adults and immature stages is provided to assist in accurate identification. Accurate identification of adults in the past has been difficult due to extensive variation in coloration, particularly for Hybomitra phaenops. Variation in adult Hybomitra phaenops throughout its known range is reviewed in derail and variation in adult H. enigmatica is briefly summarized.