Thesis (Ph. D.)--Leland Stanford junior university, 1907. / Cover title. eContent provider-neutral record in process. Description based on print version record.

No description available.

The genus Evides Dejean, 1833 (Coleoptera: Buprestidae) belongs to the family of woodboring beetles commonly known as jewel beetles. This comparative study was undertaken on the morphological characteristics of three species from field specimens, private collections and collections at the Transvaal Museum of Natural History. The genus Evides consists of eleven species and one subspecies in total worldwide. Nine species and one subspecies are endemic to Sub-Saharan Africa. One species is recorded from India and further species from Laos and Vietnam: Bellamy (World Catalogue, in prep.) The objective of the study was to quantify morphological differences between species representing the genus in South Africa. Specimens of E. gambiensis (Laporte & Gory, 1835), E. interstitialis (Obenberger, 1924) and E. pubiventris (Laporte & Gory, 1835) were collected in the Waterberg (Limpopo Province) and additional specimens of E. pubiventris were collected at Ezemvelo Nature Reserve (Gauteng Province). All three species are related, difficult to differentiate in the field and occur on the same host plants, marula (Sclerocarya birrea (A. Rich.) Hochst.) and false marula (Lannea discolor (Sonder) Engl.). Results indicate that there are morphological differences and species can be differentiated according to elytra length, total elytron width, eye size, frons length, frons width and abdomen length.

No description available.

The study consisted primarily of a number of surveys in brassica fields, using pitfall and gutter traps. At all sites a number of different species of carabids were marked and released. From the pitfall trapping it was found that different carabid species inhabitated different parts of the field, particularly in relation to the field boundaries. Two common species, Nebria brevicollis and Bembidion lampros, over-wintered in the hedgebanks, moving out into the fields in the spring. Two other common species, Pterostichus melanarius and Harpalus rufipes, were primarily associated with the field, but activity in the field boundaries continued later into the year. Marking concentrated on four species; P. cupreus, P. melanarius, H. rufipes and N. brevicollis. At all sites the recapture rate of rufipes was much lower than that of P. melanarius, though they are of similar size. Using this data, mean displacement/day was calculated for each species. To identify the causes for the differences in recapture rate between the species, two species were individually tracked at night, in the field. Positions every two minutes were recorded and the distance and turn between each point measured. The results showed that H. rufipes had a higher turn rate and moved less than melanarius. The data from tracking was incorporated into a computer simulation model which recreated the beetles' tracks, using the same time interval. Traps were added and the model used to simulate the recapture experiments in the field. Changes in dispersal patterns were used to create differences in the catch in different patches. It was found that changes in turning behaviour could not produce changes in density, because of behaviour at the boundaries. Delaying the change in behaviour produces differences in numbers, but orientation is the most likely mechanism. The relationship between step length, turn and catch was also evaluated.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references. Also available via the Internet.

Thesis (Ph. D.)--Leland Stanford junior university, 1907. / Cover title. Also issued in print.

Thesis (Ph. D.)--University of Chicago, 1913. / "Private edition, distributed by the University of Chicago libraries, Chicago, Illinois." "Reprinted from Publication 263 of the Carnegie institution of Washington." Bibliography: p. 382-384.

Thesis (M.S.)--Eastern Illinois University, 2009. / Includes bibliographical references.

Thesis (M.S.)--Virginia Polytechnic Institute, 1940. / Abstract. Includes bibliographical references (leaf 65). Also available via the Internet.