During some ecological investigations of the Vaal river at Skandinawiadrift, 20 miles south-east of Potchefstroom, Transvaal, some mayfly material was collected which included nymphs of Compsoneuriella Ulmer. * Imaginal material reared from the latter closely resembled the descriptionption of C. njalensis (Kimmins) from Njala, Sierra Leone (Kimmins, 1932). Mr D. E. Kimmins of the British Museum (Nat. Hist.), London was subsequently consulted and he confirmed the fact, that, apart from a few differences in colour pattern, which may well be variable over the considerable distance separating the two localities, it was not possible to separate the Transvaal specimens from the C. njalensis type material in his possession.
The family Noctuidae is the largest of the Lepidoptera and is very well represented in Southern Africa. Many of the worst insect pests belong to this family. The Army worm Spodoptera (Laphygma) exempta (Walk) is one of the best known. It is considered a pest of national importance and when it strikes periodically it raises fear throughout the country.
The Chlorocyphidae are easily recognized as a family. Unlike other Zygoptera so far recorded in Africa, they have a short thick body and a characteristic snout-like epistome. The wings are narrow, petiolate and have an elongate pterostigma. References and diagnoses are detailed in the author's Catalogue (1962a). The family is well represented in tropical Asia.
The lycaenid species Pseudiolaus poultoni Riley has not previously been recorded from Southern Africa, being known from the coastal region of Kenya. The subspecies P. poultoni lulua Riley, which occurs in Zulu land (Natal), is now established as a separate species by Stempffer and Bennett (1958) after study of the male-genitalia.
While studying the cause or causes of the sporadic appearance of a hypopal or ""wander-nymph"" stage in the life cycles of some acarid mites, difficulty was experienced in finding a satisfactory medium on which to rear Rhizoglyphus echinopus (Fumouze & Robin) and a Tyrophagus species. Most of the media tested were unsuitable because of extensive growths of fungi.