Genomic fosmid libraries were constructed for the BDGP by Andreas Gnirke at Exelixis, Inc. (South San Francisco) from Drosophila erecta, D. pseudoobscura, D. virilis, and D. willistoni. A page describing the libraries at the BACPAC Resource Center can be found at

http://bacpac.chori.org/drosofosmid.htm