An undescriptionbed Rayieria sp. was considered as a potential biological control agent against Acacia longifolia in South Africa. The insect is very destructive to A. longifolia in Australia, and was introduced into South Africa for host specificity studies. Feeding, and oviposition resulting in viable offspring, were restricted to Australian Acacia spp. tested. Two of these Australian species, Acacia mearnsii De Wild. and Acacia melanoxylon R. Br., are commercially important in South Africa although they are also invasive weeds. Release of the insect is therefore not recommended.
Brief coverage of the current state of knowledge of the Trichoptera (Caddisflies) of the Afrotropical Region is given, including both the Afrotropical and Malagasy Subregions. A short comparison with other Trichoptera faunas is given, with comments as to the possible origins of various elements of the Afrotropical fauna, particularly that of southern Africa.
The genus Strandietta Obenberger with its two species, S, schoutedeni Obenberger and S, jakobsoni Obenberger, is resurrected and compared to CryptodactyIus Devrolle. Various complex related genera and species are discussed and compared from a morphological and zoogeographic point of view. Two new genera and one resurrected genera is proposed.
The reproductive biologies of two species of Pachycondyla are contrasted. A nest of P. wroughtoni (Ford) that was excavated contained a mated dealate queen, but nests of P. krugeri Ford lacked any female sexuals. This queenless breeding system was investigated.
Goniozus natalensis sp. nov. is descriptionbed from material taken in the Republic of South Africa (Natal). The bethylid is a primary external parasite of the sugarcane borer Eldana saccharina Walker on Cyperus papyrus Linnaeus. Taxonomic affinities of the new species are discussed and African species currently assigned to Goniozus are considered.
Morphological and biological evidence is presented of the species level identity of the two currently recognized nominal species placed in the genus Tucumania Dyar. T. porrecta Dyar is treated as a new junior subjective synonym of T. tapiacola Dyar.
The subfamily Trypetinae is considered to comprise the tribes Trypetini, Zaceratini nov., Rivelliomimini nov., Acanthonevrini, Euphrantini, Adramini and Phytalmiini.The Afrotropical fauna is reappraised, reclassified, discussed and illustrated. Several new synonymies are proposed, and a key to the Afrotropical genera of Trypetinae is provided.
One new species of Neojulodis, N. (Protojulodis) bouyeri, and three new Acmaeodera species, A. (Acmaeodera) liessnerae, A. (A.) mwengwensis and A. (Paracmaeodera) elbiae, as well as two new Acmaeodera subspecies, A. (A.) decemgultata namibensis and A. (Rugacmaeodera) butensis desaegeri are descriptionbed and illustrated. New localities for various African Julodinae and Acmaeoderinae are listed.
The newly emerged crop was colonized primarily by D. noxia apterae from volunteer wheat. The infestation was spread by apterae migrating from plant to plant. There were indications that wind assisted the process. More persistent infestations caused significant loss in grain yield, particularly if colonization of the flag and second leaf occurred. There was no evidence to suggest that an aphid transmitted pathogen was associated with reductions in yield.
Reasons are given for considering Aloeides taylori Tite & Dickson as a junior subjective synonym of Aloeides rileyi Tite & Dickson and Aloeides merces sp. nov. is descriptionbed from Wakkerstroom, Transvaal, South Africa.