Source : Webster's Revised Unabridged Dictionary (1913)

Cockroach \Cock"roach\, n. [Sp. cucaracha.] (Zo["o]l.)
   An orthopterous insect of the genus {Blatta}, and allied
   genera.

   Note: The species are numerous, especially in hot countries.
         Those most commonly infesting houses in Europe and
         North America are {Blatta orientalis}, a large species
         often called {black beetle}, and the Croton bug
         ({Ectobia Germanica}).

Croton bug \Cro"ton bug`\ (b?g`). [From the Croton water of New
   York.] (Zo["o]l.)
   A small, active, winged species of cockroach ({Ectobia
   Germanica}), the water bug. It is common aboard ships, and in
   houses in cities, esp. in those with hot-water pipes.