Herringbone stitch is also known as Mossoul stitch, Persian stitch,
Russian stitch, Russian cross stitch, plaited stitch, catch stitch and
witch stitch. It is one of the oldest stitches used by many embroidery
styles. It is often used with mirror work. It can be modified by varying
the length of the stitch. It is used as a filler as well as border
stitch.
The stitch is worked along two parallel lines from left to right. Bring
the needle out on the left end of the line. Make a small stitch on the
upper line pointing left. Keep the thread below the needle and pull it
through the fabric. Insert the needle on the lower line a little to the
right and make a small stitch which points to the left. Pull the needle
through the fabric with the thread above the needle. This can also be
called a little modified cross stitch.