Length: typically 9-13 mm
Limnophila rufibasis adults are encountered most often in West Virginia in May and June.
The species ranges from Ontario and Wisconsin to Newfoundland and south to South Carolina.
Dr. Chen Young of the Carnegie Museum of Natural History notes that "The adult flies are commonly found in grassy margins of sluggish streams in floodplain woods and in shaded vegetation near small streams or in open woods. The immature stages are unknown."
Insects of West Virginia