In continuation of my previous paper in this Journal, Volume II, pp. 154-164, records are given here of other, interesting, gall-forming Trypetidae. Among them are species of the two groups outlined there, namely, of the Oedaspis and of the Parafreutreta series, and in addition a species of the Trypanea bulligera group.
New and unrecorded butterflies are continually being captured in the sub-continent, and this paper is an attempt to acquaint collectors and others interested in this Order with the new acquisitions of workers in this Colony and elsewhere. The Vumba Mountains and our Eastern Border have again proved to be the richest sources of novelties, and it is mainly owing to help given by collectors from those parts that I have been able to compile these notes.
This paper contains an account of a mite parasitic on certain beetles, and belonging to a new species of the genus Pygmephorus, family Tarsonemidae; it was found by Mr. R. Smithers on a Buprestid beetle at Cape Town. The placing on record of two other new forms of Tetranychid mites descriptionbed herein has been made possible by the assiduous collecting activities of Mr. M. Lavoipierre of the Natal Herbarium, Durban, who found these minute acarines living on indigenous plants in Natal. He has recently discovered a large number of Tarsonemid mites living on or attacking vegetation in Durban, both known forms and others new to science; among the latter are the two new species of Tenuipalpus which have been descriptionbed in this paper.
The damage caused by the broad mite, or dahlia mite, as it is known locally, was first noticed many years ago in Durban by Dr. A. P. D. McClean, Mycologist in charge of the Natal Herbarium, on account of its similarity to a virus disease which he was studying. He felt convinced that the pathological symptoms associated with the presence of the mites on the plants concerned were due to them, and in April 1939 suggested to the writer that he should make a study of them.
The study of the pupa of this species is of special interest for the same reason as that given in the case of the larva, which was descriptionbed in my previous article in vol. II of this journal, pp. 165-175. Here too there are a number of characters of a generalized nature, but on the other hand there are some specialized structures which are adaptations to special conditions. Apart from these special developments, the pupa, like the larva, may be used as a suitable example of how a pupa should be studied in order to give a scientific comparison between the pupae of different groups and species.
Pseudonympha trimeni gaika Riley 1938 Trans. Ent. Soc., London, 87.234. The holotype (in B.M.) was taken by me on Gaika's Kop in the Amatola range in 1933. In January, 1938, I camped for some days on the Natal-Basutoland border five miles from the eastern escarpment of the Drakensberg in the Giant's Castle area at an altitude of 9,000 feet. I found this beautiful form in some quantity. In January, 1939, I climbed Mount Machacha, the highest peak of the Malutis on the western side of Basutoland, where again this subspecies was fairly common.
Liothrips gymnosporiae Priesner (Fig. 1). I have obtained some more specimens of this species (common in Pretoria, Transvaal) from Mamathes, Basutoland, collected on the foliage of Gymnosporia buxifolia Szysz. by A. F. Hean and B. Moffatt (4th January, 1940). As this species has not yet been figured, I have given a drawing of the head and prothorax of a specimen from Fort Cox Agricultural College, Cape Province.
As is well known, the females of the vast majority of species among the insects take no interest in their eggs after they have laid them. Maternal care is well developed in the social insects, but in other groups it is a rare phenomenon.
The cowpea is the most important leguminous hay crop in the summer rainfall area. It is also a very valuable cover crop for enriching the soil. In Native areas and on the Witwatersrand Gold Mines, where the annual consumption is approximately 330,000 bushels of seed, it constitutes an essential part of the diet of natives. With the development of improved upright-growing and disease resistant types by the Potchefstroom College of Agriculture, this crop is likely to be cultivated more extensively in future.
Jacotia gen. nov. Body elongated, depressed, feebly sculptured. Head large, about two-and-a-half times as long as prothorax, and about 1.6 as long as its greatest width; its sides sub-parallel. Eyes strongly produced caudad on dorsal aspect, their dorsal length about twice their ventral length and nearly half the length of the head. Vertex produced into a hump in front of the eyes, but not extending over insertion of antennae; ocelli borne on the hump near anterior margin of eyes.
In July, 1940 I received from Professor J. C. Faure, Director of Locust Research in Pretoria, a consignment of seven specimens of the African migratory locust, Locusta migratoria migratorioides R. & F., comprising two adult female and five adult male individuals. The stock from which these locusts were bred came originally from Van Rhynsdorp, Cape Province, but were hatched, and had presumably become infested with mite parasites, in cages at Pretoria. * The mites were of two species, each belonging to quite distinct and separate families, and both kinds occurred in very large numbers.
The following brief records, with three exceptions, concern observations made, under typical Karroo conditions, in the district of Graaff-Reinet. Of the three exceptions, one is a record from the neighbouring district of Jansenville, also Karroo country, while the other two concern specimens obtained in Baviaanskloof, a portion of the Willowmore district, where conditions as to climate and vegetation are somewhat similar to those which prevail in the semitropical coastal section of the Eastern Cape Province.