The man has struck at least eight times since Spring 2011.
Police say the man hides in wooded areas near and exposes himself when college-age women approach.
On several occasions they say he slapped his buttocks after getting victims' attention, then fled.
The incidents have occurred between 8:00 p.m. and midnight near Townsend and Worrilow Halls at the University of Delaware.
He is described as 25 to 30 years old, 175-190 pounds, 5'10" to 6' tall with a shaved head with dark stubble.
Anyone who sees the suspect is asked to contact University of Delaware Police immediately at 302-831-2222.
Anyone with information about the identity of the suspect is asked to contact the Criminal Investigations Unit at 302-831-7433 or 302-831-2222 or by emailing firstname.lastname@example.org .