NEW YORK — The Dow Jones industrial average is adding Travelers and Cisco Systems, dropping Citigroup and General Motors.

The announcement this morning of the changes to the 30 stocks that make up the best-known barometer of Wall Street comes as GM enters bankruptcy protection, a move that was widely expected.

Dow Jones said in a statement that Travelers, the property and casualty insurer and one-time division of Citigroup, would replace its former parent. Cisco, which makes computer networking gear, is filling the role left by GM after 83 years as part of the Dow.

The changes take effect June 8.