Network[{Node[1, NodePosition -> {163.662323, 124.336349}, 
    NodeLabelAngle -> 2.082081], 
   Node[2, NodePosition -> {163.662384, 289.654846}, 
    NodeLabelAngle -> 2.07336], 
   Node[3, NodePosition -> {20.492247, 41.67691}, 
    NodeLabelAngle -> 2.07336], 
   Node[4, NodePosition -> {306.832428, 41.677094}, 
    NodeLabelAngle -> 2.07336], Arc[{2, 1}], Arc[{3, 1}], Arc[{3, 2}], 
   Arc[{1, 4}], Arc[{4, 3}], Arc[{4, 2}]}, ArcArrow -> False, 
  ArcArrowAngle -> 0.4, ArcArrowColor -> GrayLevel[0.], ArcArrowFlare -> 0.3, 
  ArcArrowPosition -> 1., ArcArrowSize -> 17., 
  ArcBezierPath -> {{-0.333333, 0.}, {0.333333, 0.}}, ArcCircleHeight -> 0., 
  ArcColor -> GrayLevel[0.], ArcFlipped -> True, ArcLabel -> "", 
  ArcLabelColor -> GrayLevel[0], ArcLabelDistance -> 0., 
  ArcLabelPosition -> 0., ArcLabelSide -> Right, 
  ArcLoopAngle -> 3.141592653589793, ArcLoopClockwise -> False, 
  ArcLoopSize -> 0., ArcStyle -> Line, ArcThickness -> 1., 
  NodeAnnulusRatio -> 0.2, NodeColor -> GrayLevel[0.], NodeLabel -> None, 
  NodeLabelColor -> GrayLevel[0], NodeLabelDistance -> 0., NodeSize -> 2.5, 
  NodeStyle -> Disk, PlotRange -> {{0., 325.}, {330., 5.}}, 
  ArcLabelFont :> $DefaultFont, NodeLabelFont :> $DefaultFont]