The Amblypsilopus amnoni and megastoma groups in New Guinea (Diptera: Dolichopodidae: Sciapodinae)

Two new species groups in the rich genus Amblypsilopus Bigot (Diptera: Dolichopodidae: Sciapodinae) are described from New Guinea. The amnoni group with an elongate surstylus comprises six species: A. amnoni n. sp., A. ibiscorum n. sp., A. kaindi n. sp., A. okapa n. sp., A. pascali n. sp., A. pulverulentus (Parent) and A. riuensis n. sp. The megastoma group with a greatly enlarged proboscis in both sexes is described with two species, A. ialibu n. sp. and A. megastoma n. sp. Known females of both the amnoni and megastoma groups have some anterior dorsocentral setae reduced to fine hairs, normally a character only found as a male secondary sexual character in Sciapodinae. The is another example in the Sciapodinae where an otherwise male secondary sexual character has been incorporated into the female phenotype.