in fig3 to allow viewing of the receiver 112 laterally directed round bars 92 94 extend on opposite sides of the base assembly 67 on a bottom thereof fig2 a as illustrated in fig3 the base assembly 67 includes cylindrical bosses 102 104 located substantially above the round bars 92 94 and extending laterally on opposite sides of the base the mounting structure 42 a includes hooks or seats 106 108 open upwardly and located on opposite lateral sides of the rear portion of the chassis 42 of the utility vehicle the seats 106 108 are sized to receive the round bars 92 94 therein the mounting structure 42 a further includes semicylindrical receivers 112 114 that are sized and shaped to receive the bosses 102 104 therein and guide the bosses into a mounting position the receivers 112 114 are open horizontally toward the backhoe attachment fig2 illustrates in an enlarged view the partial engagement of the base assembly 67 of the backhoe attachment 24 to the mounting structure 42 a the round rods 92 94 are already fit into the seats 106 108 the bosses 102 104 are being rotated upwardly about the rods 92 94 to engage the receivers 112 114 in a tangential direction the receivers 112 114 include.