Correction to:  CONSTRUCTION OF 2-LOCAL FINITE GROUPS OF A TYPE STUDIED BY 
SOLOMON AND BENSON

by Ran Levi and Bob Oliver

A $p$-local finite group is an algebraic structure with a classifying 
space which has many of the properties of $p$-completed classifying spaces 
of finite groups. In our paper \cite{Sol}, we constructed a family of 
2-local finite groups which are ``exotic'' in the following sense:  they 
are based on certain fusion systems over the Sylow 2-subgroup of 
$\Spin_7(q)$ ($q$ an odd prime power) shown by Solomon not to occur as the 
2-fusion in any actual finite group.  As predicted by Benson, the 
classifying spaces of these 2-local finite groups are very closely related 
to the Dwyer-Wilkerson space $BDI(4)$.  An error in our paper \cite{Sol} 
was pointed out to us by Andy Chermak, and we correct that error here.