. Bulletin of the British Museum (Natural History) Entom Supp. P. E. S. WHALLEY amined but some extreme cases occurred. In E. inops two colour phases were found, a white one with narrow brown reticulations and a brown one with slightly darker brown reticulations. Other aspects of their morphology were similar and some intermediates were found although the two extremes were very different in appearance. The wing venation varies relatively little throughout all African species (Text-figs 7-8). In the fore wing twelve veins (considering lA and iA which are often completely or partially fused, as
. Bulletin of the British Museum (Natural History) Entom Supp. P. E. S. WHALLEY amined but some extreme cases occurred. In E. inops two colour phases were found, a white one with narrow brown reticulations and a brown one with slightly darker brown reticulations. Other aspects of their morphology were similar and some intermediates were found although the two extremes were very different in appearance. The wing venation varies relatively little throughout all African species (Text-figs 7-8). In the fore wing twelve veins (considering lA and iA which are often completely or partially fused, as one vein) are always present with, in some species, fusion near their origin from the cell of radial veins, R2 to R5. In only one specimen of one species (P. stratified) was an abnormal condition detected where one fore wing vein was missing from one side. Rarely three of the radials fuse for part of their length (Epaena), more frequently only two of them join (Lelymena, Cumbaya) but in most genera R2 to R5 arise from the cell. There is some variation in the origin of lA and 2A and in particular the relative lengths of these veins. In Lelymena some variation in the venation occurs in single specimens between the left and right sides but this is exceptional. While there is some intra- specific variation in the origin of R2 to R5< in the majority of species the wing vena- tion is constant intra-specifically. The hind wing venation shows little variation. Fig. 8. Wing venation. Stviglina guttistigma Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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