The genus Hercostomoides Meuffels and Grootaert (Diptera: Dolichopodidae: Sympycninae) is revised and now comprises seven species. The type species, Hercostomoides indonesianus (Hollis) is now regarded as a junior synonym of Campsicnemus rufinus Frey, new synonym in the combination Hercostomoides rufinus (Frey), new combination. This species is widespread, ranging from the tropical Orient to Korea, and also Australia. Other species include Hercostomoides bhartii Grichanov and H. wauensis, new species, both from New Guinea, H. flavipleurus, new species, H. baroalba, new species, and H. gagnei, new species, all from Australia, and H. yapensis, new species from the Yap Islands and Guam. The generic definition of Hercostomoides is revised to comprise Sympycninae that have femur III without a strong anterior preapical seta, dorsal setae present on the antennal scape, and whose females have a tectiform clypeus.