A α_excess vs. λ_turnoff diagram showing 2M1139 and the transition disk samples in Ophuichus and Taurus. Transition disks with inner holes due to grain growth/dust settling are indicated by red symbols, those due to photoevaporation by blue, and those due to giant planet formation by grey. Debris disks are indicated by black filled symbols. Open green circles indicate objects with accretion rates of 1E-11 to 1E-9 M_⊙ yr^-1 and values of L_D/L_∗ between 1E-3 to 1E-2. Blue open circles indicate non-accretors (<1E-11 M_⊙ yr^-1) with L_D/L_∗ between 1E-3 and 1E-2. Black open circles indicate non-accretors (<1E-11 M_⊙ yr^-1) with weak disks (L_D/L_∗  < 1E-3).