The Mosquito pieces can be added to a standard Hive set before the start of the game giving each player 12 pieces to play with.
During the game, they are placed in the same way as the other pieces. Once in play, the Mosquito takes on the movement characteristics of any creature it touches at the time, thus changing its characteristics throughout the game.
Exception: If moved as a Beetle on top of the Hive, it continues to move as a Beetle until it climbs down from the Hive.
The expansion consists of two game pieces (one each for the black and for the white player), to be used in addition to the pieces of the base game.