Three new species and one new record of Wilkinsonellus Mason (Hymenoptera, Braconidae) from the Australo-Oriental region.

The small microgastrine braconid genus Wilkinsonellus Mason was known previously from parts of the Australo-Oriental region, but it has never been reported from Borneo (Brunei and Sarawak), Peninsular Malaysia, Seram, or the Solomon Islands before this study. Here we describe three new species, namely, Wilkinsonelluscarinatus Liu & Polaszek, sp. nov. from Brunei, Sarawak, and Seram; Wilkinsonellusparacorpustriacolor Liu & Polaszek, sp. nov. from Sarawak; and Wilkinsonellusrugiscutum Liu & Polaszek, sp. nov. from Peninsular Malaysia. We also present a new distribution record of Wilkinsonellusamplus Austin & Dangerfield from the Solomon Islands, along with a key to 21 species known from the Australo-Oriental region.