Hyalostola is a genus of moths belonging to the subfamily Drepaninae. It contains the species Hyalostola phoenicochyta, which is found on Borneo. The wingspan is about 26 mm. The forewings are semi-hyaline white, irrorated with rufous scales and tinged with purplish crimson to beyond the middle. There are traces of rufous postmedial line, oblique to vein 4 and then incurved. There are some rufous marks before the termen. The hindwings are semi-hyaline white, tinged with purplish crimson, and irrorated with some rufous scales. There are some diffused rufous marks on the termen.