This is the Locrian mode. It is played from B to B in the key of C Major. This is the last mode we have to learn in the Major key. B Locrian is the diminished mode. Look at the image below.
The B note is highlighted. Remember all of the modes in the key of C major have the same notes. C, D, E, F, G, A, B and C. Look at the image below.
Look at the image above and notice the C Ionian mode in there too. You should remember the Ionian mode in the key of C major is played from C to C.
Look at the image below and notice the fingering for this B Locrian mode. The B notes have been highlighted and the fingering pattern illustrated. You would start this mode off with the Low E string, 7th fret, 1 finger. Move through all the strings to the high E string, playing from B to B. Try to come up with some other places to play all of these modes.
The Locrian mode is the only odd ball mode. It is a diminished mode, the other modes are either major or minor. This can be a very dark mode.
We have now covered every mode of the key of C major. There has been an enormous amount of information presented to you. As you study these modes, remember you can play them at different locations. You can play the A Aeolian mode starting at the 5th fret, but you can also play this mode starting at any A note on the fret-board. The same holds true for all of the modes. Learn the modes and also learn the relative minor and major scales to each scale.