The hind-wings, when developed, are characteristic in form, possessing a sub-costal nervure with which the reduced radial nervure usually becomes associated. [Please select]
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Costal area: the area behind costal vein; see also, costal field. [Please select]
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Costal margin: the anterior margin of a wing whether it is really costate or not. [Please select]
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Exterior margin: the outer margin; sometimes used for costal margin. [Please select]
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Lower margin: of tegmina (Thomas), is the costal or anterior margin of other authors. [Please select]
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Aside from certain peculiarities of the wing-venation (a costal and a humeral vein on the hind wings) these Metal-marks may be known by their minuteness and the bright metallic markings on the brown wings. [Please select]
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