This stitch is beautiful, made by weaving over the double herringbone stitch with another thread of same or different color. This stitch requires patience to learn. Once learnt, it will be very easy to do this stitch, and will never be forgotten! 🙂 Interlaced herringbone stitch forms one of the main stitches for one of the most popular indian embrodieries called Kutch work.

You need to know the double herringbone stitch to be able to continue with this tutorial. This tutorial is best understood by following the illustrations, without much dependence on the description.

double_herringbone_stitch …. Double herringbone stitch: First, make a row of double herringbone stitch as the base.
interlaced_herringbone_1   interlaced_herringbone_2
Fig 1: Bring the needle out with a contrasting colored thread from the left corner of the double herringbone stitch row. 
Observe that the stitch a-b and c-d lies over the stitch p-q. So, to weave, take the needle under the legs of p-q, as shown. This locks the thread in there.
  Fig 2: Now, take needle over the leg of c-d, again passing under p-q, and over the contrasting thread. Then, go under r-s.
interlaced_herringbone_3   interlaced_herringbone_4
Fig 3: Keep up with this procedure of weaving around the ‘crossings’  for the upper half of the double herringbone stitch.   Fig 4: When you reach the right end of the double herringbone stitch, turn around the needle, by weaving around, as illustrated.
interlaced_herringbone_5   interlaced_herringbone_6
Fig 5: We keep up with the same method of weaving, only this time, it is inverse, or upside down. Follow the illustrations to undertand how the needle goes up and down the stitches and threads in a perfect weave.   Fig 6: If you look at a single stitch ( x-y) of the double herringbone stitch, you will see how the threads have passed over and under it alternately.
interlaced_herringbone_7   interlaced_herringbone_8
Fig 7: Continue this process of weaving for the bottom half of the double cross stitch, until you reach back to the left end. End the weaving at the point from where you began from.   Fig 8: A perfect weave of the interlaced herringbone stitch should show up like this. 🙂