Police said the 35-year-old woman was in the 1600-block of West Diversey Parkway at about 12:22 p.m. when she was struck by the robber, who took her belongings and fled on a bicycle.
In one of the photos, the suspect is seen holding the victim's purse.
Anyone with information is asked to contact Area North Bureau of Detectives (312) 744-8263.