Species circumscription within the Rediviva neliana group (Hymenoptera: Melittidae), with the description of the new species Rediviva vogeli sp. nov. Melin & Colville.

Rediviva neliana Cockerell 1931 has been considered to be widely distributed along the southeastern and eastern Escarpment of South Africa and Lesotho, with high variation in foreleg length recorded across populations. A recent analysis of the allometric relationship between foreleg length and body size for the oil-collecting species of Rediviva revealed that R. neliana is a notable 'outlier', suggesting that it represented a group of species and not a single taxon.

Revision of the endemic South African genus Moegistorhynchus Macquart (Diptera: Nemestrinidae), with a species key, description of three new species and comments on pollination biology and biogeography.

The genus Moegistorhynchus Macquart is revised and its relationships are discussed. The genus is distributed across lowland and montane areas of the Western and Northern Cape provinces, extending from Cape Town (Western Cape province) in the south to Port Nolloth (Northern Cape province) in the north. Three new species are described from Western Cape specimens: Moegistorhynchus manningi sp.

The first species of Nemestrinidae (Diptera) endemic to Madagascar: A remarkable new species of Atriadops Wandolleck, 1897.

A new species of Nemestrinidae, Atriadops irwini Barraclough sp. nov., is described and illustrated from Sakaramy in the far north of Madagascar at about the same latitude as the Comoros Islands.