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- Volume 21, Issue 1, 1958
Journal of the Entomological Society of Southern Africa - Volume 21, Issue 1, 1958
Volumes & issues
Volume 21, Issue 1, 1958
Source: Journal of the Entomological Society of Southern Africa 21, pp 03 –15 (1958)More Less
This quotation from Francis Bacon might very well apply to the situation in this country as regards the brown locust. We have repaired to some extent the misfortune of being subject to sporadic plagues of Locustana pardalina (Wlk.), but we are far from having reduced it to a harmless subject under man's dominion. I propose this evening to discuss the brown locust problem very briefly from the point of view of its history as a plague and our attempts at controlling it. In particular I would like to pose certain questions which have a direct bearing on locust control policy and to answer them as accurately as we can at this stage, at the same time pointing to what I consider the most profitable lines for future research on this age-old problem.
Author J.C. FaureSource: Journal of the Entomological Society of Southern Africa 21, pp 16 –35 (1958)More Less
Talitha gen. nov. Body elongate, flattened dorso-ventrally, sculpturing weak and inconspicuous; head about 1.3-1.6 as long as wide, 1.3-1.6 as long as pronotum and about 1.8--2.0 as long as tube, cheeks almost parallel; eyes not bulging, forming a continuous line with cheeks, about 0.3 as long as head, not markedly prolonged dorsally or ventrally, but produced into a short more or less blunt point on outer posterior angle on dorsal side; head width at eyes about 1.0 - 1.2 of width on basal collar; antennae eight segmented, areola of segment ii situated about at middle of total length of segment or basad of the middle, segment iii asymmetrical and with a prominent ridge or ledge at base, segment viii broad at base, not pedicellate, sense-cones short,
Author Joyce Omer-CooperSource: Journal of the Entomological Society of Southern Africa 21, pp 36 –55 (1958)More Less
The scutellum is hidden; the metepisterna do not reach the mesocoxal cavities; the tarsi are evidently 5-jointed, the joints of the metatarsi lobed. The internal lamellae of the metacoxae are only detached behind, forming the metacoxal processes; the metasternal wings are narrow; the prosternal process and the prosternum are on the same plane, the prosternal process lanceolate or narrow and sharply pointed; in Neptosternus it is trifid.
On Rhinoestrus steyni n.sp. and Gasterophilus zebrae Rodhain & Bequaert (Diptera), parasites of Burchell's zebra (Equus burchelli Gray)Author F. ZumptSource: Journal of the Entomological Society of Southern Africa 21, pp 56 –65 (1958)More Less
Through the kindness of Mr. T. J. Steyn, Director of Nature Conservation in the Transvaal, I was given permission to kill a zebra in the Hans Merensky Nature Reserve (P.O. Letsitele, N. Transvaal), for scientific purposes. This zebra, living in a half-tame condition with a few horses, was causing some trouble and had therefore to be destroyed. The examination of this zebra produced some interesting results.
Author G. De LottoSource: Journal of the Entomological Society of Southern Africa 21, pp 66 –68 (1958)More Less
Saissetia munroi sp. n. (fig. 1). Fully mature female circular, strongly convex, without dorsal or lateral ridges; colour evenly dark brown; surface smooth; diameter up to 5.5 mm. Dorsal dermis strongly chitinized and marked by fairly large circular or elongate pale areas, each enclosing a minute pore. Dorsal setae small, stoutly conical, evenly distributed. Tubercle-like pores of varying diameter, hemispherical, set in a group of 7 to 10 in front of anal plates. Anal plates together as long as their combined width with outer angle rounded and with one discal seta and two or three small apical ones.
Author Richard Zur StrassenSource: Journal of the Entomological Society of Southern Africa 21, pp 69 –79 (1958)More Less
Well known as widely distributed in Africa south of the Sahara, this species is of economic importance in South Africa as the vector of virus diseases of tobacco and tomato (Moore & Anderssen 1939). Moulton in 1948 reported Fr. schultzei as occurring also in Brazil, Australia (also as a vector of a virus disease) and New Guinea, from where the species was known before under other names, which are, according to Moulton, to be regarded as synonyms. The list of host plants contains more than fifty different species, to which I am able to add two further plants, i.e. groundnut (Arachis) and Lantana camara Linnaeus.
Author H.E. PatersonSource: Journal of the Entomological Society of Southern Africa 21, pp 80 –84 (1958)More Less
Stygeromyia zumpti n.sp. has only been found on the upper northern and southern slopes of the Magaliesberg range near Hartebeestpoort Dam, and may be confined to these mountains. All the specimens mentioned were caught as they circled the catcher. In flight they emit a soft, very characteristic buzz which at once identifies the species. None of the specimens was caught biting although they were given the opportunity to do so. One female was induced to bite by applying the open end of the vial in which she was confined over my forearm. The bite was not painful, did not bleed and no reaction occurred. The feed lasted fifteen minutes.
Source: Journal of the Entomological Society of Southern Africa 21, pp 85 –112 (1958)More Less
In the study of the population dynamics of any species of animal it is essential to be able to recognise that animal with certainty in all its stages. During investigations on the Red Locust, Nomadacris septem fasciata (Serville), in the Rukwa Valley, Tanganyika Territory, it became apparent that the egg pods of this species were not being accurately distinguished from those of other species of grasshopper. A study of the egg pods of the grasshoppers found in the Rukwa Valley was therefore undertaken.
Author C.N. SmithersSource: Journal of the Entomological Society of Southern Africa 21, pp 113 –116 (1958)More Less
During the past two years an interesting psocid has been encountered several times in houses in Southern Rhodesia; this species, which is assigned to a new genus and and which is descriptionbed below seems to prefer living on poorly illuminated, damp walls. It has not yet been collected in any outdoor habitat but its pale colour, light-shunning habits and affinities suggest that it may be found in caves or in damp rock crevices. The nearest approach to a ""natural"" habitat so far known for it, is the inside surface of the wall of a native hut. It is an active species capable of jumping several inches when disturbed, but being brachypterous, is incapable of flight.
Desrciption of a new species of African tabanid belonging to the subgenus Hybomitra Enderlein, 1922 (Tabaninae, Diptera).Author J.A. Travassos Santos DiasSource: Journal of the Entomological Society of Southern Africa 21, pp 117 –120 (1958)More Less
Tabanus (Hybomitra) sousadiasi n.sp. female - Body: Length 14 millimeters; Wing: Length - 11 millimeters. Head Eyes bare. Frons four times as long as wide at the level of the antennae, covered with brown tomentum, with some scattered golden-yellow hairs. Calli yellowish-brown in colour: lower callus quadrangular; upper callus lanceolate, with a small longitudinal median depression; shining area at vertex triangular, of the same colour as the calli and with numerous medium-sized punctuations.
Author Erwin LindnerSource: Journal of the Entomological Society of Southern Africa 21, pp 121 –128 (1958)More Less
Das Studium einer Sendung von Stratiomyiiden aus Sï¿½dafrika erbrachte wieder einige bemerkenswerte Ergebnisse. Sic seien im Folgenden nieder-gelegt. Es handelt sich dabei um eine wesentliche Ergï¿½nzung unserer Kenntnisse ï¿½ber die Verbreitung einiger Arten. Dazu kommen einige neue Formen und unter ihnen drei neue Gattungen.
Author R.F. LawrenceSource: Journal of the Entomological Society of Southern Africa 21, pp 129 –131 (1958)More Less
While working on a collection of Opiliones from Madagascar which had been sent to me by Professor Max Vachon of the Paris National Museum, I was puzzled by the appearance of some peculiar hairs adhering to the mouthparts of a species of phalangodid harvest-spider, Anaceros humilis Lawr., in one of the phials. These hairs, which superficially suggested a peculiar type of sensory structure, were in all cases attached by their enlarged sperm-like heads to the spines and setae of the pedipalps, chelicerae and legs of the harvest-spiders; they were extremely minute, 0.5 mm in length, and were only detached and mounted on a slide with considerable difficulty.
Author D.W. EwerSource: Journal of the Entomological Society of Southern Africa 21, pp 132 –138 (1958)More Less
Lentula callani is a small grasshopper which displays certain striking anatomical peculiarities. It is completely wingless and, reflecting this condition, the meso- and metatergites, together with that of the first abdominal segment, are fused into a single unit almost totally devoid of sculpturing. Further there is no typanum. The organisation of the thoracic pleurites is shewn in fig. 1a where it is compared with the same area of a brachypterous specimen of Zonocerus elegans Thunb., a pyrgomorphine of comparable size. (fig. 1b).
Author M.K.P. Ryke, P.A.J. & MeyerSource: Journal of the Entomological Society of Southern Africa 21, pp 139 –161 (1958)More Less
There has been no comprehensive study of the parasitoid Acarina associated with beetles in South Africa. Berlese has descriptionbed a few species in scattered papers (1908, 1910, 1921) and Ryke & Meyer (1957) have investigated the mites of the family Eviphididae. The present paper is based on material collected in the Western Transvaal and deals with ten species, eight of which are new to science, from the families Macrochelidae, Pachylaelaptidae and Laelaptidae. We are extremely grateful to Dr. G. O. Evans and Mr. K. H. Hyatt, both of the British Museum (Nat. Hist.), London, for their help and to Prof. J. W. Geyer of the Department of Entomology, University of Pretoria for the identification of the beetles.
Recent outbreaks of the brown locust, Locustana pardalina (Walk), with special reference to the influence of rainfallSource: Journal of the Entomological Society of Southern Africa 21, pp 162 –213 (1958)More Less
This paper is essentially a continuation of the work of du Plessis (1938) who reviewed the history of brown locust outbreaks in South Africa from 1910 to 1938/39 and attempted at the same time to correlate them with fluctuations in the rainfall over the main outbreak areas. The present study covers a period of fourteen years from 1941l/42 to 1954/55 during which the brown locust increased from a very low level of infestation to a peak year of swarming in 1950/51 and finally became reduced to relatively small numbers again in 1954/55.