The Shari, as you call them, don't exist. The race that gave the Kilrathi jump technology has two names, due to two different books. One name given is the Shata, the other is the Utara, though I may be mispelling the last one. Please correct if I am. I don't have my novels at college with me, but I think I recall that the Utara is the name given in Fleet Action where Kirha is at the Gallagher's with Bear, Hunter, and the rest. Shata is the name given in Action Stations. Someone may want to check the novels to be sure and get an entirely correct answer.
However, I'm not sure if these two races are one in the same, due to a continuity error on the author's part, or whether somehow two races were involved. I believe that each novel states that it's respective race gave the Kilrathi space and the ability to travel using jump points. That's my best info for now. Hope this helps