Six species of Issidae from the Mascarenes are descriptionbed. Two of these are new, namely Tylana nigromaculata spec. nov. from Mauritius and Reunion, and T. rodriguensis spec. nov. from Rodrigues. T. cristata (F.), T. carinata (F.), T. indecora Stal and T. mameti Synave are redescriptionbed. A lectotype is designated for T. indecora. T. similis Synave is sunk as a synonym of T. carinata, while T. macabeana Synave and T. conspersa Synave (nec Schmidt) are considered synonyms of T. indecora.
Six species of Issidae from the Mascarenes are descriptionbed. Two of these are new, namely Tylana nigromaculata spec. nov. from Mauritius and Reunion, and T. rodriguensis spec. nov. from Rodrigues. T. cristata (F.), T. carinata (F.), T. indecora Stal and T. mameti Synave are redescriptionbed. A lectotype is designated or T. indecora. T. similis Synave is sunk as a synonym of T. carinata, while. macabeana Synave and T. conspersa Synave (nec Schmidt) are considered synonyms of T. indecora.
Seven new species of biting midges from the northern Transvaal are descriptionbed and illustrated: Forcipomyia Forcipomyia) creesi, F. (F.) letabanus, F. (Lepidohelea) ikinae, F. (L.) roseae, F. (Schizoforcipomyia) lecordeurorum, Alluaudomyia magoebai,and Kolenohelea uysorum. Monahelea calcarata Goetghebuer is transferred to the genus Kolenohelea (comb. nov.). A key is given to separate the five Subsaharan species of Forcipomyia (Schizoforcipomyia); corrections are made in the species assigned to the subgenus F. (Lepidohelea).
Six species are currently placed in the genus Neoardelio Hendel (Steyskal 1980). Of these, three (N. alternatus Walker), N. lineatocollis (Thomson), N. longiala Steyskal) occur in the Cape Province of South Africa, one (N. retifrons Steyskal) occurs in the mountains of Lesotho and two (N. brevicornis (Loew), N. longipennis (Loew)) are nomina nuda descriptionbed from 'Africa', in all probability South Africa.
Heteronychus orator (F.) and H. tenuestriatus Fairmaire were reared in the laboratory at 25ï¿½C and 60-90% R.H. for one and two generations respectively. The adults were fed on potato tubers and the larvae on decaying organic matter in soil. The eggs hatched in about 14 days. The hatching rate was 56% for H. orator and 60% for H. tenuestriatus, and the larval survival rates were 33% and 31% respectively. The larval stages averaged 62 days and 67 days, the pupal survival rates were 75% and 77%, and the pupal stages averaged 74 days and 42 days, though one specimen of H. arator took 24:0 days to emerge.
The taxonomic characters used to separate the genera Cochlochila Stal and Naochila Drake are discussed. The genus Cochlochila is subdivided into three subgenera. A new subgenus, Cochlochila (Kibongoto), is erected for C. kilimensis Horvath and six other species. The name Physodictyon is withdrawn from synonymy for the subgenus containing C. lewisi (Scott). C, nilgiriensis (Distant) is removed from Cochlochila. Keys to the species of each subgenus are given. Nine new species are descriptionbed: C. (C.) dispar, C. (C.) multipilosa, C. (C.) minuscula, C. (C.) theroni, C. (C.) austroafricana, C. (C.) ampliata, C. (C.) longispinosa, C. (Kibongoto) bamendana. Further distribution data and host-plants are recorded.
A new genus and species of Lygaeidae, Anneckecoris brunneus, are descriptionbed from the southwest Cape and assigned to the tribe Stygnocorini. Host plant, habitat information and/or nymphal descriptionptions are given for paracnemodus capensis Slater, Sweetocoris parafenestratus O'Rourke, S. slateri O'Rourke, S. minutus (Scudder) and Lasiosomus lasiosomoides (Bergevin). The eggs of S. minulus and S. drakensbergensis O'Rourke are descriptionbed. The distributions of paracnemodus, Lasiosomus and Sweetocoris are discussed, and the possible paraphyly of the Stygnocorini is suggested. Figures are included of the macropterous and coleopteroid forms, the abdomen and the spermatheca of Anneckecoris brunneus.
Large numbers of Culicoides midges were caught on ten days in March-May 1981 on a farm where African horse sickness occurred. Eleven species of Culicoides were recorded, among which C. imicola was abundant and both C. milnei and C. zuluensis were common. Bluetongue virus was isolated on four occasions, and a further eight unidentified virus isolations were made.
Lunar phases, and the lower temperatures in the cool season, did not greatly affect moth catches. More moths were trapped on days of wind convergence than on days of no convergence, indicating that migration of these two species is likely to occur. A. segetum was capable of completing four generations and A. ipsilon five generations per annum. A method of forecasting the population density of each species after the cool season, based on rainfall in the four months prior to this season, is descriptionbed.
A descriptionption with illustrations is given of the behaviour of a female pompilid wasp, probably Paracyphononyx africanus (Radoszkowski), which was observed to paralyse its Iycosine host temporarily, deposit an egg and then to abandon the spider, which subsequently recovered. Biological information on other parasitic Pompilidae is reviewed briefly.
The presence of a yellow variety in the populations of the Mediterranean black scale, Saissetia oleae (Olivier) Homoptera: Coccidae), in Israel is reported. The phenology of this variety on citrus resembled that of the common type, but it was probably subject to differential mortality during the early adult stage. Females of this variety produced only yellow-form progeny.
Aloeides rossouwi spec. nov and A. nubilus spec. nov. from the Transvaal, South Africa, and A. tearei spec. nov. from South West Africa (Namibia) are descriptionbed, and notes on their known habits and distribution are given.
The reproductive system consists of the testes, vasa efferentia and deferentia, vesiculae seminales, three pairs of accessory glands (bean-shaped, tubular, and ectadenia), the ductus ejaculatorius and the aedeagus, all of which are descriptionbed and illustrated. As well as large volumes of viable spermatozoa, the testes produce spermatogonia, which provides histological confirmation of the long adult life of Parastizopus annalieeps. During copulation the beetle produces a spermatophore, in the formation of which the bean-shaped accessory glands play a cardinal role.