Ceranemota semifasciata is a moth in the Drepanidae family. It was described by Benjamin in 1938. It is found in North America, where it has been recorded from northern California. The wingspan is about 35 mm. The forewings are grey with a pale greenish dusting along the costa. The base is white with a small black spot near the center, beyond this a small black spot, and obliquely toward the inner margin, a small tuft of black and white scales. The transverse anterior and posterior lines are broad rufous, the former preceded by a broad more or less indistinct fuscous shade, the latter followed by a narrower band of the same colour. Four small fuscous spots are found on costa, beyond the transverse posterior line, the two outer ones better defined than the two inner ones. There is a well de