Lifer. Larva found under a log in a small, muddy stream.
Via NSCI group:
https://www.facebook.com/photo/?fbid=897511258578998&set=pcb.945259507315459
Photo by: TayZa Aung
Via NSCIMY: https://www.facebook.com/photo?fbid=289396110719472&set=gm.893697982471612&idorvanity=766618795179532. Photo by: Si Mon
Best guess based on scalation. Please correct if wrong.