Lantana camara L. is an ornamental perennial shrub indigenous to Mexico and Central America. This plant is commonly referred to as Lantana, but it is also known by various popular names such as ""tickberry"", ""cherry pie"", ""Bosmandruiwe"", ""voï¿½lbrandewyn"" and as ""mfifunyane"" in Zulu. Because of its beauty and richness of flower colour it was originally introduced to many parts of the world where it was grown as an ornamental shrub or hedge plant. In tropical and subtropical climates it experienced excellent conditions for rapid growth and prolific fruit formation with the result that it soon became established as a serious weed.
Diloponis inconspicuus Pope was descriptionbed as a new genus and species of ladybird beetle by Pope (1961), and the determination of its taxonomic relationships with allied genera necessitated a revision of the tribe Pharini. In addition to the type specimens in the British Museum (Nat. Hist.), London, male and female paratypes were deposited in the National Collection of Insects, Pretoria.
Previous studies on the ecology of the mosquitoes of the Northern Guinea Savannah of Nigeria have shown that both Anopheles gambiae Giles and A. funestus Giles, the two primary vectors of human malaria, are markedly anthropophilic (Service, 1963). Out of 511 A. gambiae and 311 A. funestus collected from inside huts and out of doors and tested by precipitin tests for the origins of their blood meals, only 16 per cent. of A. gambiae and 28 per cent. of A. funestus were found to have fed on animals. It was further shown that other species which were often taken biting man, e.g. A. rufipes (Gough), A. rufipes var. ingrami Edw., A. flavicosta Edw. and A. hancocki var. brohieri Edw., fed also to some extent on animals.
The migration of Belenois aurota F. in South Africa has received considerable attention over the past few years (Dickson and Schofield, 1958; Taylor, 1959; van Bruggen, 1960, 1961) and migration of Catopsilia florella L. has been recorded in some detail by Williams (1958).
During a revision of the slide-collection of Siphonaptera at the South African Institute for Medical Research, some problems arose about the identification of specimens of the hirsuta-group of Xenopsylla Glinkiewicz, 1907. By studying more extensive material (previously in alcohol) of most of the species concerned, it was possible to overcome some of the difficulties. Of the group, two excellent monographs are already available (Hopkins & Rotschild, 1953; de Meillon, Davis & Hardy, 1961). They were of the greatest assistance in preparing this paper and therefore descriptionptions could be less detailed, though the main features of each taxon are fully indicated.
The new species of Conchaspis Cockerell descriptionbed in this paper was recently discovered by the writer during two collecting trips to the South Coast of Natal, where the insects were found to be fairly common on branches of Ekebergia meyeri Presl.
The posterior abdominal tergites of the cockroach Pseudoderopeltis bicolor (Thunb.) are covered by an opaque, sticky secretion to which no previous reference can be found. This secretion occurs on all nymphs and females but not on adult males. The parts covered by the secretion are shown in fig. 1. The lateral margins of tergites six and seven curve up so that two depressions are formed, one on either side of a central dorsal ridge. While covering the tergites completely, the secretion tends to accumulate in these depressions.
The experiments conducted by Ripley and Hepburn (1931, 1935) led to their suggestion that the male lure terpinyl acetate be used to assist in the direct control of the Natal fruit fly Pterandrus rosa (Karsch) in South Africa. It was suggested that the lure be diluted in whale or vegetable oil and exposed in traps in conjunction with traps containing pollard bait. These workers found that when used in this manner terpinyl acetate was also a strong lure for males of the Mediterranean fruit fly Ceratitis capitata (Wied.), but that with this species attraction could be reduced during cool weather.
The present article is based mainly on a number of samples of springtails taken by Mr C. N. Smithers (then of the Division of Entomology, Department of Agriculture, Salisbury) and his wife in the eastern part of Southern Rhodesia. Although no fewer than 375 individuals were available for examination, only three different species were recognized in the collection
This paper is based on material collected by J. Hamon during a visit to the East African Institute of Malaria and Vector-borne Disease at Amani, Tanganyika, in March 1959. In addition to the new species and the early stages dealt with here, the collection contained two new Eretmapodites and one new Culiciomyia species which have been descriptionbed elsewhere (Hamon & van Someren, 1961 ).
The cosmopolitan genus Aphytis Howard comprises approximately 50 species of which 13 are known to occur in South Africa. This paper presents a survey of the species found in this country and of some other species imported from overseas as an aid to the biological control of certain citrus scale insect pests in South Africa. The paper also attemps to supply the need for up-to-date keys for the determination of the species encountered in orchards infested with diaspine scales. For this purpose comparatively few publications were available in the past. A fundamental study of the systematics of the genus Aphytis was made by Compere (1955) whose paper may still be regarded as a standard for future work.
Diagnostic characters of the subfamily Colymbetinae. Anterior border of the eyes notched by a process of the clypeus; base of the pronotum without a scutellary lobe, the scutellum therefore visible; prosternal process on the same plane as the middle of the prosternum; all tarsi five segmented; anterior tarsi of the male with the underside of the dilated segments bearing small suckers which form an oblong or linear palette.
Previous reports (Daiber, 1962, 1964) have dealt with the population dynamics of potato aphids and the leaf roll spread at Rietvlei Experiment Station on the Transvaal Highveld. The experiments showed a high leaf roll spread as has been observed in potatoes on the Transvaal Highveld for many years. To obtain high yields Highveld farmers are compelled to buy virus-free seed potatoes every year. Seed potatoes are multiplied in the northern Cape Province, and Rietriver Experiment Station was selected during the war to provide the seed potato producers with mother seed, since an aphid survey had shown very low numbers of Myzus persicae (Sulzer) on the foliage at Rietriver (van der Plank, 1944; van der Plank & Wasserman, 1945). After some years of successful seed potato production at Rietriver, leaf roll incidence increased seriously there in seed potatoes during the late 1950's.
About the end of September, 1962, a pair of interesting parasitic wasps collected at Durbanville (C.P.), was submitted to the author for identification. On examination these insects proved to be Megalyra fasciipennis Westwood belonging to the small Australian family, Megalyridae. Froggatt (1907:90) recorded the larvae of A1. fasciipennis as parasitic in the wood-boring larvae of Cerambycidae of the genus Phoracantha Newman, an Australian genus infesting various species of Eucalyptus. Two species of this genus, P. semipunctata (Fabr.) and P. recurva Newman, which were accidentally introduced into South Africa, probably about 1900, are pests of economic importance, attacking mainly newly felled timber and sickly or dead trees.