(ScStr: l. 46'; b. 6'3"; dph. 3'9"; a. 1 18' spar torpedo; cl. Squib)
Wasp, a torpedo boat commanded by Master's Mate J. W. Matherson, CSN, was attached to the James River Squadron in 1865. She was employed in the vain attempt to remove the obstructions in Trent's Reach on 23-24 January. Accompanying Richmond down the river, she neared "Battery Semmes" where she assisted in refloating Hornet. She also made an unsuccessful attempt to tow Scorpion off the shore and grounded herself. Later she retired to "Battery Dantzler" where she was used as a picket boat assigned to Virginia, until the evacuation of Richmond, 3 April 1865.