The Collaborative International Dictionary of English v.0.48:

Coalmouse \Coal"mouse`\, n. (Zool.)
   A small species of titmouse, with a black head; the coletit.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Coletit \Cole"tit`\ or Coaltit \Coal"tit\, n. (Zool.)
   A small European titmouse (Parus ater), so named from its
   black color; -- called also coalmouse and colemouse.
   [1913 Webster]