In a food processor, pulse the pecans until they resemble fine crumbs. Be careful not to over grind and create a paste. In a small saucepan, melt the butter. Add the brown sugar and the corn syrup. Bring to boil. Remove from the heat and add the ground pecans, and flour. Mix well. Drop teaspoonfuls onto a greased cookie sheet. Bake for 5 to 8 minutes or until brown around the edges and lace-like in appearance. Remove from the oven and allow to cool for 5 minutes. Transfer to wire rack. Place chocolate chips in a small plastic bag. Immerse the bag into barely simmering water until the chips melt. Once the chips are melted, snip a small corner off the bag. Pipe a chocolate squiggle onto each cookie. Allow chocolate to harden before storing cookies.