1. Apparatus for producing wigs by tying ''''hair'''' forming filaments to a net support or the like by chain stitches, with the filaments extending outwardly from a front surface of the support, said apparatus comprising, in combination, a reciprocable hooked needle; means operable to pierce said needle through said support from the back side thereof to the front side thereof; a thread guide adjacent the front side of said support operable to feed thread to the hook of said needle for drawing of a thread loop through the fabric by said needle to form respective tying stitches tying the filaments successively to said support; a rotatable metering disc adjacent the front side of said support and through which said needle is extended to draw thread from said thread guide; a thread cutting blade adjacent the front side of said support; a thread cutting projection on said disc operable to engage thread drawn by said needle to draw a loop of the thread and engage the bight of the loop with said cutting blade to sever the same; said reciprocable needle, immediately following formation of each tying stitch, and in advance of forming the succeeding tying stitch, forming a series of at least two successive conventional and complete chain stitches in said support using the same tHread as used to form the respective single tying stitches; said disc having an angular velocity inversely proportional to the number of conventional chain stitches formed in said support between two successive tying stitches; said thread guide comprising two spaced and aligned fixed thread guides adjacent the front side of said support, and an oscillatable looper positioned between said two stationary thread guides and said support; and a bar reciprocable transversely of its length between said two stationary thread guides and operable to engage the thread extending between said two stationary guides to tension the thread to straighten the loop formed by oscillation of said looper.