Hylypnes isosticha is a moth in the family Xyloryctidae. It was described by Edward Meyrick in 1915. It is found in Australia,[1] where it has been recorded in Queensland.
The wingspan is about . The forewings are whitish ochreous with a small oblique fuscous mark on the base of the costa. The stigmata are small and dark fuscous, the plical obliquely beyond the first discal. There is a very strongly curved subterminal series of cloudy dark fuscous dots from beneath the costa beyond the middle to above the dorsum beyond the middle and a series of dark fuscous dots around the posterior part of the costa and termen. The hindwings are whitish.[2]