In my article in the last number of the Class. Quart., dealing with Apuleius glosses in the ‘Abolita’ Glossary, there should have been, on p. 41, a note explaining the gloss ‘Aerugo: sanguisuga’ (p. 86, 10);

What has happened to give the item this form? Perhaps the original entries were as follows:

‘Aerugo: <?>’ (Met. 1. 21).

‘<Hirudo>: sanguisuga’ (? Met. 6, 26).

‘Aerugo’ must have been altered to ‘Herugo,’ and through confusion the two glosses became merged in one.