Dr. Geoffrey Bond, Geologist at the National Museum, Bulawayo, recently informed me that the fluorescence of scorpions in ultraviolet radiation was a fact well known to many field mineralogists and geologists. At my request he kindly agreed to follow up the matter, and in May 1952, wrote to say that he had tested a number of preserved scorpions of the genera Parabuthus, Uroplectes, Hadogenes, and Opisthophthalmus in the collections of the National Museum at Bulawayo with positive results. A number of tests with various species of scorpions in the spirit collection of the Natal Museum confirmed all Dr. Bond's observations.
My son, D. M. Cookson, and I made a collecting trip to Southern Rhodesia from mid-February to mid-March 1954 and the following notes deal with some of the rarer butterflies caught on that trip. A list of Sphingidae taken at a Mercury Vapour lamp and netted at dusk is also given.
The status of the genus Platybelus is far from clear, and the classification should be clarified and new genera erected to separate the diverse forms now included in the genus. A number of specimens have been examined from various sources which appear to form natural links between genera of the Platybelinae, and in two instances to be presently discussed, seem to provide bridges between the subfamilies Centrotinae and Platybelinae.
The object of this paper is to review the present status of the genus Pneumonyssus Banks, the members of which are known to inhabit exclusively the respiratory tract of monkeys and baboons (Cercopithecidae) , dassies (Procaviidae) and dogs (Canidae). Keys are given to the males and females of the known species and two new species from the Vervet Monkey, Cerco-pithecus aethiops (L) and the Chacma Baboon, Papio ursinus (Kerr) are descriptionbed.
Among a small collection of scale insects submitted by the Entomological Section of the Department of Agriculture, Asmara, Eritrea, three apparently new species were found and are herein descriptionbed. The holotype of each species will in due course be deposited in the British Museum (N.H.), London, and a paratype in the U.S. National Collection of Coccidae, Washington D.C., U.S.A. The remaining para types are in the collection of the Department of Agriculture, Nairobi, Kenya.
A few years ago laboratory experiments with Cryptotermes brevis were commenced in Port Elizaheth to study the reactions of the insect to several different species of wood and also to wood kept under certain atmospheric conditions. In addition toxicity tests of wood treated with preservatives were undertaken. The technique which was employed originally was very similar to that descriptionbed hy Kofoid and Bowe but was discarded in favour of Wolcott's. A third method based on that descriptionbed by Kalshoven was also followed. This method is thought to he a new one and is descriptionbed below.
The effect of temperature on the rate of pulsation of the lateral body-wall of embryos at two different developmental stages was determined. It was concluded that if used as a physiological indicator, these pulsations would presumably not give a true picture of velocity of embryonic growth.
In many nymphal acridids there occur pterothoracic muscles which are lost shortly after the final moult (Thomas 1953, Ewer 1954). The present paper descriptionbes briefly the innervation of thpse muscles in Acanthacris ruficornis (Fab.) Passing references to some have been made in earlier papers in this series (Ewer 1953 and in press). For convenience of descriptionption the muscles are treated in groups. All observations have been made upon nymphs fixed in 70% alcohol.
The grasshopper, Zonocerus elegans Thunb, occurs in mixed populations of long and short winged forms. The macropterous forms, though sluggish, are able to fly. Their elytra are about three times the length of those of brachypterous individuals. An examination has been made of the pterothoracic musculature and its innervation together with a comparative study of the sclerites of the wing base. All material used was fixed in 70% alcohol.
Nesbitt (1951) separated the genus Garmania from those mites of the genus Typhlodromus Scheuten having less than 19 pairs of setae on their dorsa. Characteristic of Garmania Nesbitt (in contrast to its subgenus Paragarmania Nesbitt) is the presence of a small anal plate bearing only three setae (Nesbitt, 1951). Two species of Paragarmania and four species of Garmania were partially redescriptionbed by Nesbitt: all of them were discovered and previously descriptionbed by Oudemans.
In spraying insecticides, it used to be the practice to apply very large volumes of material at low concentrations. In orchards for example, the liquid would be applied until it ran off all affected surfaces, so that only the concentration of the insecticide had to be specified. The time taken and the expense involved in carting and dispersing hundreds of gallons of liquid per acre is resulting in attempts at control of insects with low-volume instead of this high-volume spraying.