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Material and methods
Specimens prepared for SEM examination were investigated with the aid of a JEOL JSM–840 SEM using an acceleration voltage of 5kV. Colour photographs were taken with the aid of a Leica M165C stereomicroscope using a Zeiss Axiocam MRc5 digital camera (TMSA) and Olympus SZX12 Colour View Soft Imaging System (RMNH). Several photographs of a subject were taken at different focus levels before they were stacked with the aid of the CombineZP software program to increase depth of focus.
The material examined will be placed in the following collections: The Natural History Museum, London (BMNH); Muséum national d'Histoire naturelle, Paris (MNHN); D.H. Jacobs collection, Pretoria (DHJS); Musée Royal de l’Afrique Centrale, Tervuren (MRAC); Natal Museum, Pietermaritzburg (NMSA); National Collection of Insects, Pretoria (SANC); Transvaal Museum, Pretoria (TMSA) and Netherlands Centre for Biodiversity Naturalis, Leiden (RMNH).
All lengths are given in mm; b in captions = scale bar.