Twelve months ago our Society conferred a great honour on me by electing me President - a much appreciated tribute to a humble, but enthusiastic, amateur from members who are highly qualified and widely recognized for their valuable work in the vast field of entomology. In their quiet way amateurs have contributed much to our knowledge of various branches of natural history. If the full story could be told, I believe they have achieved most success in this country in probing our butterfly mysteries.
The Systropinae are well represented in Africa whence the type species, Systropus macilentus Wiedemann, was descriptionbed. About thirty species have since been recorded from the continent, the majority of which are to be found descriptionbed in the works of Bezzi (1924), Enderlein (1926, 1930) and Hesse (1938). Several species not considered by these authors were named by Speiser (1914) and Curran (1927) while additional species have been descriptionbed by Franï¿½ois (1954) and Bowden (1962). Seguy (1934) recorded a second species from Madagascar, Enderlein (1926) being the first to descriptionbe a Malagasy species of Systropus, although Wandolleck (1897) noted an unnamed species (as Cephenus) from Madagascar.
Walshe (1950, 1951), has descriptionbed the biology and behaviour of the immature stages of Rheotanytarsus rivulorum Kieffer, a European species, but so far nothing has been recorded about the young stages of R. fuscus Freeman imagos of which, collected from the Great Berg River, Western Cape Province, were descriptionbed as a new species by Freeman in 1954. The larva and pupa of fuscus are therefore descriptionbed in this paper, and some notes on their behaviour and ecology given.
The members of the genus Lecaniodiaspis Targioni-Tozetti are generally considered to be a very homogeneous group of insects belonging to the family Asterolecaniidae (Balachowsky, 1948; Ferris, 1955). Borchsenius (1959) separated Lecaniodiaspis and six allied genera from the Asterolecaniidae and erected a new family, the Lecaniodiaspididae, to contain these genera. He regarded this family as being more closely related to the Coccidae than the Asterolecaniidae (Borchsenius, 1959, 1961).
Two of the most important genera of Coccidae of the Ethiopian region have been almost fully descriptionbed by De Lotto - Coccus (l957b, 1959) and Saissetia (1956, 1957a). His lead is here being followed, and this is the first of perhaps two papers attempting to redescriptionbe the Ethiopian species of the genus Pulvinaria Targioni - Tozzetti, 1867.
The present paper deals with part of a collection of rhodacarid mites recovered from soil by means of Berlese funnels. Of the seven new species for which a new genus is created, two were found in pasture soil near Potchefstroom whereas the other five were collected from the floor of the evergreen indigenous montane forest at Magoebaskloof in the Northern Transvaal. The genus is referred to the Rhodacaridae mainly on account of the presence of a divided dorsal shield in the nymphal stages and the nature of the chaetotaxy of the legs (Evans, 1963) which is basically similar to that of the other known rhodacarid genera. The type material of the new species is deposited in the collection of the Institute for Zoological Research, Potchefstroom University.
This paper descriptionbes the results of a study of habitat associations of larvae of culicine mosquitoes in the South African highveld region. This study is part of a comprehensive investigation on the ecology of the mosquito-borne viruses known as Sindbis and West Nile, the results of which are at present being published (McIntosh et al., Jupp and McIntosh, in press).
In the present study twelve species of Diaspididae are dealt with of which Diaspis aequalis, D. delottoi, Formosaspis karroo, Morganella acaciae, Lindingaspis equipora, Rungaspis arcuata, Selenaspidus latus and Tecaspis angularis are descriptionbed for the first time; Chionaspis ambiguus Brain, Tecaspis kiggelariae (Brain) and T. visci (Brain) are redescriptionbed, the first being transferred to Andaspis MacGillivray; and Aulacaspis madiunensis (Zehnt.) is recorded from South Africa for the first time.
During the autumn months of 1966 most of South Africa experienced an unprecendented upsurge in butterfly numbers which spread roughly eastwards from north-westerly localities. Although the precise reasons for this outbreak remain obscure, the heavy rains after months of drought experienced by parts of the north-west Cape, South West Africa and probably also the adjacent regions of Bechuanaland must have contributed largely towards providing the favourable conditions necessary to trigger such a population explosion. These rains commenced in January 1966 and continued intermittently into February.