NEW YORK — May Department Stores Co. has named James A. Hageman chairman of its Foley’s division, based in Houston, succeeding Donald R. Andrus, who resigned to pursue other interests, according to the company.

Andrus, 50, would not comment on his departure or plans.

Hageman, also 50, has been chairman of Famous-Barr, May Co.’s St. Louis-based division. May Co. said Wednesday it would name his successor soon.

Heywood L. Wilansky, 46, continues as Foley’s president and chief executive officer and top merchant.

Foley’s, with 47 stores, iis May Co.’s largest division. Last year’s sales were $1.6 billion. The division has a five-year, $278 million expansion plan through 1998 that involves opening a 200,000-square-foot store at Woodlands Mall in Houston and a 150,000-square-foot store at the Mall of the Mainland in Texas City, Texas, this year. Five stores are planned for 1995.

Hageman, an operations executive, has been with May Co. since 1978, when he joined the L.S. Ayres division as vice president of operations. He was named the store’s chairman in 1988 and chairman of Famous-Barr in 1990. L.S. Ayres was consolidated into Famous-Barr in 1992.