One of the most important diseases found in South African potatoes is the leaf roll disease, caused by the leaf roll virus, Solanum virus 14, Smith. For a profitable return in the main table potato growing areas of the country new stock must constantly be introduced. The leaf roll virus is transmitted by certain aphid species, mainly Myzus persicae (Sulz.) (Smith and Brierley, 1956). A better understanding of the epidemiology of the disease in a certain area can be obtained when the population dynamics of the potato aphids are carefully investigated.
This paper deals with Encyrtidae which were submitted to the writer for determination, or collected during the course of his work. The types of new species will be deposited in the National Collection of Insects, Division of Entomology, Pretoria; paratypes of species descriptionbed on good series will be sent to the British Museum (Natural History), London, the United States National Museum, Washington, D.C., and the Transvaal Museum, Pretoria.
The material from which Saussure descriptionbed Crypsicerus cubicus in 1888 was immature. The first adult female of this rare species was descriptionbed only recently by Rehn (1955) on material from Swakopmund, S.W.Africa. Further specimens, collected on a recent visit to the Central Namib, now make it possible to descriptionbe the hitherto unknown male. Although both Dirsh (1954) and Rehn (op. cit.), have published satisfactory photographs of this curious insect, the only figure so far published, is of the head and pronotum by Miller (1932). As a further aid to the identification of this remarkable insect detailed illustrations of the male are now given.
This paper is a continuation of similarly entitled papers which deal with the acridid fauna of Southern Africa. The species enumerated below have resulted from collections made in mountain localities associated with the central eastern plateau of the Drakensberg, South Africa. Apart from incidental collecting by Dr H. Scott, the only recent collection of grasshoppers made in these parts is that of Drs P. Brinck and G. Rudebeck of the 1950ï¿½51 Swedish Expedition to South Africa (abbreviated here to SESA).
Breeding experiments to study the nymphs or nymphal shucks of African Odonata at Douglasdale, Bulawayo, were continued during the first half of 1961. The following species which require no further comment than their period of emergence were reared during these months:
During the tenure of a WHO-Fellowship in 1960, I visited several zoological museums in Europe, and I was thus in the fortunate position of being able to study a great amount of historic and recent material of Calliphoridae, Oestridae and Gasterophilidae preserved in their collections. This enabled me to clear the status of many doubtful species and also to descriptionbe a number of species new to science.
The Elipsocidae are represented in Africa by two species of Nepiomorpha Pearman from Angola; Elipsocus fasciatus (Navas) has been descriptionbed from the Canary Islands. In this paper four new species of Elipsocus Hagen are descriptionbed and records given for Tricladellus nitens (Hickman) in Africa. Holotypes and allotypes of the species descriptionbed in this paper will be deposited in the British Museum (Natural History), London; paratypes are retained by the author.
Coccus anneckei spec. nov., fig. 1 Body elongate, 2.5 mm long. Dorsal dermis membranous with numerous minute circular pores evenly distributed. Tubercle-like pores small, flat with a granulate surface, set in an elongate loose group of 24 along the median line of the body. Dorsal setae straight, robust, slightly narrowed at the apex; rounded or bluntly pointed. All setae attain the same size and shape and are distributed without any pattern. Submarginal tubercles absent.
The results of collecting butterflies on my 10,000 miles caravan safari in 1957, which embraced Moï¿½ambique, Southern Rhodesia and the South Western Cape, and of other rambles through Southern Africa have revealed considerable new information about our butterfly fauna. This paper includes the descriptionptions of ten new species of Lycaenidae, a new species of Neptis (Nymphalidae), new records of rare species, the addition of four species, previously only known from Central Africa, to the list of Southern African Lepidoptera, and a key to the difficult genus Neptis F for species which occur in Southern Africa.
The cocktail ant, Crematogaster peringueyi var. angustior Arnold, occurs to a greater or lesser extent in most of the grape growing areas of the Western Cape Province. Although it is not as wide-spread as the Argentine ant Iridomyrmex humilis Mayr the cocktail ant must be regarded as a species of economic importance.
Lepidochrysops lotana spec. nov., plate 8, figs. 1-2 and 5-6 Male Holotype: Exp. 42 mm, figs. 1 and 5. Head: frons whitish-grey; palpi below and at side white, third joint of palpi fairly long, white below and black above; antennae black, shaft finely cheque red with white, club very elongate and brownish below. Thorax: black clothed above with greyish hairs, below with white hairs and scales.
The genus Pseudomachaerota Melichar, 1915 is heretofore known from its original descriptionption and from a unique female specimen from Madagascar. Its systematic status has long been problematical. An examination of Melichar's type disproves his assumption that it stood very close ("" steht sehr nahe"") to Apomachaerota E. Schmidt, 1907, a Malaysian genus of the family Machaerotidae, subfamily Enderleiniinae.
Amongst some specimens of Galleriinae sent to me by Dr L. Vï¿½ri for identification were two specimens which looked superficially like Aphomia sociella L. These specimens were found in the nest of a bee, Xylocopa (M.) flavorufa DeG., and thus have a similar habitat to A. sociella. On examination of the specimens the male was found to lack the large cell in the forewing which is characteristic of the genus Aphomia Hb. The venation and the enlarged basal segment of the antennae show that this species should be placed in the genus Paralipsa Butler.
Two species of Yellow-Headed Borer have been recorded attacking coffee in Kenya. These are Dirphya nigricornis (Olivier) and Neonitocris princeps (Jordan). The original record was due to Anderson (1917) who listed Dirphya usambica (Kolbe) in a note on new coffee pests. D. usambica is now (Breuning, 1956) regarded as a form of D. nigricornis.