Petitioners seek to challenge a consent decree approving an agreement settling a Title VII lawsuit against the City of New York. After the results of a police sergeant’s examination revealed that blacks and Hispanics had passed the examination at disproportionately low rates, groups representing these minority members of the New York City Police Department sued the Department under Title VII of the Civil Rights Act of 1964, 78 Stat. 253, as amended, 42
*303
U. S. C. § 2000e
et seq.
Three other groups were permitted to intervene as codefendants: “the Sergeants Benevolent Association (‘SBA’), representing over 500 officers on the eligible list who had obtained provisional appointments as sergeants; the Sergeants Eligibles Association (‘SEA’), representing officers who were on the eligible list but had not received provisional appointments; and various white ethnic societies and other individual officers (the ‘Schneider Intervenors’).”
Hispanic Society of New York City Police Dept.
v.
New York City Police Dept.,
Petitioners are a group of white police officers who claim that they were not placed on the eligible list even though they had scored at least as high on the examination as the lowest scoring minority officer promoted under the interim order. Although they presented their objections to the District Court at the hearing, they chose not to move to intervene pursuant to Federal Rule of Civil Procedure 24, either initially as codefendants or later to replace the Schneider Intervenors for purposes of appeal. See
United Airlines, Inc.
v.
McDonald,
As to the issue raised in
Marino,
namely, whether a district court may dismiss as an impermissible collateral attack a lawsuit challenging a consent decree by nonparties to the underlying litigation, we are equally divided, and therefore affirm the judgment of the Court of Appeals. As to the issue raised in
Costello,
we hold that because petitioners were not parties to the underlying lawsuit, and because they failed to intervene for purposes of appeal, they may not appeal from the consent decree approving that lawsuit’s settlement; therefore, we affirm the judgment of the Court of Appeals. The rule that only parties to a lawsuit, or those that properly become parties, may appeal an adverse judgment, is well settled. See,
e. g., United States ex rel. Louisiana
v.
Jack,
Accordingly, the judgments of the Court of Appeals are
Affirmed.
