Pyrausta subsequalis, also known as the weedfield sable, is a moth in the family Crambidae. It was described by Achille Guenée in 1854. It is found in much of North America, where it has been recorded from southern Alberta and southern British Columbia south to Arizona and New Mexico and east to Florida and north to Ontario. The habitat consists of dry prairie areas.

The wingspan is 14–18 mm. Adults have been recorded on wing from July to early September. In coastal areas of California, they are seen year-round.

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