A man using a blowgun also called a blowtube.
blowgun definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a long, tubelike weapon through which darts or pellets are blown
blowgun definition by American Heritage Dictionary
A long narrow pipe through which darts or pellets may be blown. Also called blowpipe.