Report on the host associations of the genus Macrosiagon (Coleoptera: Ripiphoridae) in Sulawesi (Indonesia)
Jan Batelka, Patrick Hoehn
The wasp hosts of three species of the genus Macrosiagon Hentz, 1830 (Coleoptera: Ripiphoridae: Ripiphorinae: Macrosiagonini) are recorded from Central Sulawesi (Indonesia). Macrosiagon nasuta (Thunberg, 1784) was reared from the nests of Rhynchium haemorrhoidale (Fabricius, 1775) and Epsilon manifestatum crassipunctatum (Gusenleitner, 1991) (both Vespidae: Eumeninae), Macrosiagon cf. punctulaticeps (Blackburn, 1899) was reared from the nests of Pison sp. (Crabronidae: Trypoxylonini) and Chalybion sp. (Sphecidae: Sceliphronini), and Macrosiagon pusilla (Gerstaecker, 1855) was reared from the nests of Auplopus sp. (Pompilidae: Auplopodini). A review of known associations between the hosts and reared parasitoids is provided. The family Pompilidae is recorded as a host group for the genus Macrosiagon for the first time.