The Benoist XIV, also called The Lark of Duluth, was a small biplane flying boat built in the United States in 1913 in the hope of using it to carry paying passengers.

[clarification needed] The repairs and paint job left the aircraft with the partial name, "of Du".

Their newly formed company, the St. Petersburg–Tampa Airboat Line purchased the Lark of Duluth and another Benoist XIV to inaugurate operations.

Over the next three months of the airline's short lifetime, the Lark of Duluth and her near-sister Florida (construction number 45) carried 1,205 passengers over Tampa Bay.

At the end of March, however, the city subsidy ran out, and it proved no longer profitable to continue the service.