Network[{Node[1, NodePosition -> {36., 75.}], 
   Node[2, NodePosition -> {288., 75.}], 
   Node[3, NodePosition -> {36., 255.}], 
   Node[4, NodePosition -> {288., 255.}], 
   Arc[{1, 2}, ArcBezierPath -> 
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    ArcCircleHeight -> 0.277429, ArcStyle -> Circle, ArcLabelSide -> Right], 
   Arc[{2, 1}, ArcBezierPath -> 
     {{-0.383693, 0.369905}, {0.383693, 0.369905}}, 
    ArcCircleHeight -> 0.277429, ArcStyle -> Circle, ArcLabelSide -> Right], 
   Arc[{3, 1}, ArcBezierPath -> 
     {{-0.4077830000000001, 0.451748}, {0.4077830000000001, 0.451748}}, 
    ArcCircleHeight -> 0.338811, ArcStyle -> Line, ArcLabelSide -> Right], 
   Arc[{3, 4}, ArcBezierPath -> 
     {{-0.383693, 0.369905}, {0.383693, 0.369905}}, 
    ArcCircleHeight -> 0.277429, ArcStyle -> Circle, ArcLabelSide -> Left], 
   Arc[{3, 4}, ArcBezierPath -> 
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    ArcCircleHeight -> -0.277429, ArcStyle -> Circle, ArcLabelSide -> Right]\
    , Arc[{4, 2}, ArcBezierPath -> {{-0.333333, 0.}, {0.333333, 0.}}, 
    ArcCircleHeight -> 0., ArcStyle -> Line, ArcLabelSide -> Right]}, 
  ArcArrow -> False, ArcArrowAngle -> 0.4, ArcArrowColor -> GrayLevel[0.], 
  ArcArrowFlare -> 0.3, ArcArrowPosition -> 1., ArcArrowSize -> 17., 
  ArcColor -> GrayLevel[0.], ArcFlipped -> False, ArcLabel -> "", 
  ArcLabelColor -> GrayLevel[0], ArcLabelDistance -> 0., 
  ArcLabelPosition -> 0., ArcLoopAngle -> 3.141592653589793, 
  ArcLoopClockwise -> False, ArcLoopSize -> 0., ArcThickness -> 1., 
  NodeAnnulusRatio -> 0.2, NodeColor -> GrayLevel[0.], NodeLabel -> None, 
  NodeLabelAngle -> 0., NodeLabelColor -> GrayLevel[0], 
  NodeLabelDistance -> 0., NodeSize -> 3., NodeStyle -> Disk, 
  PlotRange -> {{0., 325.}, {330., 5.}}, ArcLabelFont :> $DefaultFont, 
  NodeLabelFont :> $DefaultFont]