Kaila in Pohl & Nanz (2023) notes that this subfamily Chimabacchinae Heinemann, 1870 has been historically misspelled as Chimabachinae, a misspelling that iNaturalist had copied.

Heinemann (1870) p. 130-132: family spelled as Chimabacchidae, from genus Chimabacche: https://www.google.com/books/edition/Die_Schmetterlinge_Deutschlands_und_der/ewwAAAAAQAAJ?hl=en&gbpv=1&pg=PA130&printsec=frontcover&dq=Chimabacchidae

Pohl & Nanz (2023): http://www.wedgefoundation.org/MONA2.asp