Abstract
Five species representing the family Cydnidae sensu lato are recorded from Guam; three of them are reported for the first time from the island: Byrsinus varians (Fabricius, 1803), Fromundus biimpressus (Horváth, 1919), and Rhytidoporus indentatus Uhler, 1877. The widespread species, Fromundus pygmaeus (Dallas), was recorded by Ruckes (1963) and verified by us. The occurrence of a fifth species, previously listed from the island by Ruckes (1963) and Lis (1996), namely Adrisa flavomarginata (Vollenhoven, 1868), is regarded as doubtful. Of four currently known burrower bug species occurring on Guam, three are Oriental and one is American in origin. A key to all burrower bug species known from the island is provided. Additionally, Microporus shiromai Froeschner, 1976 from Hawaii is regarded as a junior synonym of Byrsinus varians (Fabricius, 1803).References
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