The formation of the United States Basketball League, a summer professional league, was announced in New York. The brainchild of 33-year-old Milford, Conn. investor Daniel T. Meisenheimer, the USBL is scheduled to begin play next June in at least eight eastern locations: Atlanta, under the ownership of ex-New York Knick Walt Frazier; White Plains, N.Y., owned by another ex-Knick, Dick Barnett; Boca Raton, Fla.; Long Island, owned by Meisenheimer; Central New Jersey; Providence; New Haven, and Springfield, Mass.

The league is seeking local organizers in Baltimore and Boston, and is hoping to field teams in 14 other cities, including Washington, in the next two years.

A 40- to 50-game regular season is being planned. Each team will have a salary cap of $250,000, compared to $3.6 million for NBA teams. The USBL will conduct a May draft . . . .

Boston forward-center Kevin McHale, who hasn't missed a game in his five-year National Basketball Association career, is expected to be sidelined for at least two contests with partially torn left ankle ligaments. Celtics trainer Ray Melchiorre said McHale, who has played in 413 consecutive regular-season and playoff games, was hurt in the third quarter of Wednesday night's 107-92 loss to Milwaukee.