Costal margin: the anterior margin of a wing whether it is really costate or not. [Please select]
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Onopordinis_, but proportionably more elongate and less convex; rostrum and thorax longer; pilosity of the body underneath much thinner and shorter; thighs thicker, more clavate, the anterior evidently costate-rugose underneath; without whitish marks on the elytra, and without that layer of light-brown earth-like pollinose transudation which is often wanting in rubbed specimens of _Larinus Onopordinis_. [Please select]
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