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2 - Abdomen and flash
Basically, an ant body consists of three very distinct parts: the abdomen, a very thin waist and a head that's slightly smaller than the abdomen. Dub the abdomen in the shape of a rugby ball. The size of the abdomen is about 1,5 times the distance from the barb to the hook point of a TMC 102Y hook. This will give you enough room for the tiny waist. Tie in one strand of pearl Crystal Flash immediately in front of the abdomen.