This extremely local butterfly, Leptoneura jansei Swierstra, was discovered by Dr. A. J. T. Janse on the farm ""Warmberg"" Pietersburg Dist. (12th March,1904). Since that date further search for this unique butterfly has apparently been seriously neglected by other collectors, as 31 years elapsed before it was rediscovered. During a visit to the Transvaal Museum in 1932, Mr. G. van Son drew my attention to L. jansei. A certain sense of fascination for rare insects inspired me to hunt for it.
Leptoneura jansei Swierstra. Annals of the Transvaal Museum, I, p. 175, 1911. The holotype, a female taken on the farm Warmberg, Pietersburg District, Transvaal, on the 12th March, 1904, is in the Transvaal Museum. As no other specimens were found until very recently, the male of this species remained unknown, and I now take the opportunity of descriptionbing and figuring it and also giving an account and figure of its genitalia.
This paper is a preliminary report on observations made in the Karroo during the period 1936-1940, during the course of an intensive study of the field ecology of the brown locust, undertaken by Mr. C. J. B. Smit and the writer. Since our attention was concentrated on Locustana pardalina (Walk), it was not possible to do more than to make incidental observations on the distribution and habits of other species of Acrididae.
We have at our disposal detailed data on the life history of the brown locust, Locustana pardalina (Walk.). These data were obtained from cage experiments (Faure 1923 and 1932), and also from direct observations in the field (Smit 1939). Du Plessis (1938) undertook a detailed study of climatic conditions prevailing in the outbreak region from 1912 to 1937, and correlated these with the recent history of outbreaks, with a view to defining the conditions favourable for incipient swarming.
Ten short papers dealing with the Coccidae of Southern Rhodesia have been published at intervals during the past thirteen years* in the course of which 171 species have either been descriptionbed or recorded. New species and species not previously recorded from this Colony continue to be collected from time to time and the present short paper deals with ten such species for two of which new genera are erected.