I have a dozen observations posted at iNat of Schinia citrinellus, some of which are posted here at BG, and it turns out that all are misidentified Leucocnemis nivalis. These white moths have a single brown spine at the "knee" of the foreleg. All Schinia have an array of several spines on the foreleg, not a single spine and this single spine on this does not qualify as the character that defines the genus. I looked very closely at the "knees" on the many Leucocnemis perfundis that I have phtographed, and they also have the same single spine as clearly seen on the moths I've seen like this. This is a character of Leucocnemis, at least the two Leucocnemis species I have observed.

Here is a link to a good pic by Mako Jon that clearly shows the spines on the forelegs of a REAL Schina citrinellus.
https://www.inaturalist.org/observations/16290902. Ann H also has pics of real citrinellus here at BG that show the array of spines.

I've come to the conclusion that I have not seen a single citrinellus. All of my observations identified as citrinellus are of nivalis.