In some countries, cotton seed is disinfected as a supplementary measure to control Platyedra gossypiella Saund. The practice began m Egypt where the insect remains in larval diapause in the seed, a habit which favours the dissemination of the pest. In Mozambique, where the pest is widespread, seed disinfection was adopted in addition to other methods of control on the assumption that Pink bollworm had the same habits as in Egypt.
While carrying out a series of dusting experiments on cockroaches, it was observed that those cockroaches dusted with 3% and 5% DDT in talc respired apparently more freely than those batches treated with dusts containing Gammexane (666) and Pyrethrum. The glass jars, for example, containing cockroaches dusted approximately twenty-four hours previously with 5% DDT, showed greater moisture condensation on their inner surfaces than those containing cockroaches dusted at the same time with a 3% DDT dust.
The discovery of Stolotermes africanus in the Cape Province in 1935 by Dr. Harold Kirby constituted a record of a relict termite that might well be compared to such relict vertebrates as the lungfishes, the egg-laying mammals, or the marsupials. The genus Stolotermes is a group of very primitive termite species, more primitive in some respects than Mastotermes of Australia. Stolotermes belongs to the family Hodotermitidae, the most primitive genus of which is Archotermopsis of India.
For many years wood preservation tests have been running at Pienaars River in the Transvaal Bushveld some forty miles north of Pretoria. These were started by C. B. Simpson to test the resistance of various treated and untreated indigenous woods to the ravages of termites. Expansion in the scope of the work has since taken place under the aegis of the Forest Products Institute of the Department of Forestry.
The earliest reference to this butterfly appears to be Trimen's note in ""Rhopalocera Africae Australis"" (Part II, p. 344) which records a specimen, considered to be ""an extraordinary variety or 'sport' "" of the male Zeritis thysbe, which was captured by Gross near Platteklip, on the ascent of Table Mountain, in 1865. The specimen is referred to again in ""South African Butterflies"" (Vol. II, p. 182), and a second ""somewhat similar male example,"" taken by Layard near Cape Town, is also mentioned by Trimen.
The present paper is the outcome of an attempt to sort into their respective genera the undetermined Apidae in the collections of the National Museum. The literature dealing with the Ethiopian Apidae is voluminous and very scattered, but in no part of it can a comprehensive key to the genera be found. I have endeavoured to rectify this omission in the hope that such a key may be of use to others, especially to students and entomologists in other museums.
Beetles of the family Coccinellidae are usually considered as beneficial insects, with the exception of those belonging to the subfamily Epilachninae, members of which are phytophagous and often cause extensive damage to economic plants in different parts of the world. The Mexican bean beetle, Epilachna corrupta Muls., a serious pest in the United States of America, is perhaps the best known member of the Epilachninae.
It will interest members to learn that the library of the Society is now in working order and, though it is still small, it is hoped that full use will be made of the facilities offered. A few remarks on the state of the library and the procedure of borrowing books will help to simplify matters both for the borrower and the librarian.