Euphalacra semisecta is a moth in the family Drepanidae. The first known description is by William Warren in 1922, although Warren attributed the species to Hampson.[1] It is found on Borneo, Sumatra and Peninsular Malaysia, with a type locality on Sumatra.[1]
The larvae feed on Plectocomiopsis geminiflorus.[2] A survey in 2013 found that adults are attracted to bait traps with fermenting banana,[3] and were the only species of Drepanidae recorded in the survey to prefer them over bait traps with rotting prawn.[3]
Euphalacra semisecta has pale forewings marked with interrupted brown bands and rounded anterior corners.[1]