The House of Delegates and Senate are expected to return to the Capitol on June 9 to complete the process of drawing new boundaries for the state’s 11 congressional districts.

The timing won’t be official until a joint notice is distributed by the House and Senate clerks’ offices.

But delegates were informed late Thursday that they should come to Richmond that day and should plan to stay overnight in hopes that the process can be completed in two days.

In April, the House of Delegates adopted a new map drawn in consultation with Virginia’s incumbent congressmen. It changes districts to reflect population shifts revealed by the 2010 Census.

Senate Democrats have started the process of adopting a competing map which would craft a new district in which black voters are a sizable minority — in addition to another district in which they hold a majority. The House plan, like Virginia’s current map, includes one majority-minority district.

Senate Democrats say a new minority “influence district” would ensure that the state’s congressional delegation was more likely to reflect the state’s demographics. Though nearly 20 percent of Virginia’s population is black, only one of its members of Congress is an African American.

It’s unclear how vigorously the Senate will fight for its map, however: The House’s plan was drawn with input from the three Democrats now serving in Congress, as well as the delegation’s Republicans.