The subgenus Atrichopogon (Lophomyidium) with a revision of the Nearctic species (Diptera: Ceratopogonidae)

Atrichopogon Kieffer, subgenus Rostropogon Remm, is a junior synonym of the subgenus Lophomyidium Cordero (NEW STATUS, NEW SYNONYMY). Monohelea ocumare Ortiz from Venezuela is transferred to Atrichopogon (Lophomyidium)(NEW COMBINATION). The Holarctic species Atrichopogon polydactylus Nielsen is a junior synonym of A. fusculus (Coquillett), a widespread and common species previously reported from only the Western Hemisphere. Four Nearctic species are described as NEW SPECIES: A. jamnbacki from salt and brackish marshes along the Atlantic coast from Nova Scotia to North Carolina; the following freshwater species, A. deyrupi from southern Florida; A. archboldi, from southern Florida, Texas and California, and southward well into the Neotropical Region; and A. borkenti, from western Canada. The larvae of A. (Lophomyidium) are found on wet wood, soil, and stones in marshy habitats. Adults of A. fz~sculus have been observed feeding on insect carrion in spider webs.