Thaumatopsis pectinifer is a moth in the Crambidae family. It was described by Zeller in 1877. It is found in North America, where it has been recorded from North Dakota to Oklahoma, Texas and southern Florida, as well as Michigan and Indiana.
The wingspan is 19-22 mm. The forewings are pale yellowish brown, darkest along the costa. The hindwings are pale fuscous. Adults are on wing in March, from May to June and from August to November.
The larvae feed on various grasses, including corn. They bore the stem of their host plant.
References
Thaumatopsis pectinifer Wikipedia(Text) CC BY-SA