Paracylindromorphus cephalopristis Bellamy, sp. nov., is descriptionbed from the southwestern Cape Province. Taphrocerus capensis Hespenheide, sp. nov., the first Old World species of both this genus and its tribe, Brachyini, is descriptionbed from Natal. Brief comments on the relationship between these genera and Aphanisticus and their respective subfamilies and tribes are given.
The optimum combination of host fruit and temperature at a relative humidity of 75 ï¿½ 5 % for the mass rearing of the long mussel scale, Insulaspis gloverii (Packard) was determined under laboratory conditions. Host fruits that were used were citrus fruits, butternuts and potatoes.
A key is provided for 23 species of Drosophilidae, 21 of which have been found in areas of human settlement in southern Africa; seven of these species are cosmopolitan and eight others are widespread in Africa. Several cryptic species are included, their identification requiring examination of male genitalia; all other species key on features of external morphology.
Onymacris laeviceps Gebien is an endemic tenebrionid beetle of the sand dunes of the central Namib Desert. In our study area it was most frequently associated with mobile slipfaces near dune crests. When not on the surface, the beetles bury themselves within the sand dunes. During February and March (late summer), these beetles had a bimodal daily activity pattern and their movements appeared to be correlated with temperature.
Phylogenetic analysis of the primitive Scarabaeoidea indicated that the Hybosoridae is the sister-group of the monophyletic Ochodaeidae. Analysis of the Ochodaeidae resulted in several distinct lineages, some of which are here accorded new taxonomic status.
The surface structure of the eggs of Culex theileri Theobald, is descriptionbed. Based on the morphology, the egg is divided into four regions, and the possible role that each region plays is discussed.
The genus Lithurge Latreille is represented by four species which is revised. A key for the identification of the species is provided and a redescriptionption is given for each species. A note on the biology of L. spiniferus is included.
Surveys on the introduced apionid weeviI Trichapion lativentre showed that adult and larval feeding damage inhibited the growth of the South American weed Sesbania punicea and reduced seed-set of the plants by more than 80% on average in the East London area, South Africa. Intraspecific competition for food and breeding sites occurred on one occasion when there were over six adult weevils per 300 mm of branch in spring.
Maize plants were artificially infested with egg batches of Busseola fusca at different times after crop emergence. Regression equations of yield loss on percentage plants with eggs varied over different seasons, which was attributed to hybrid differences and variation in climate.