While not necessarily the most scholarly, these timeline sites on the Web may help.
The following print reference books are ones you can trust.
African American Chronology
E 185 .H62 1994
This 2-volume set presents significant economic, political, social, educational, and cultural milestones in the history of blacks in America from 1492 through 1993.
African American Years: Chronologies of American History and Experience
E 185 .S797 2003
This book begins with a chronology of important events in African American history, starting in 1444 and ending in 2002. The bulk of the volume contains primary documents corresponding to the events listed in the opening chronology.
Black Chronology from 4000 B.C. to the Abolition of the Slave Trade
DT 17 .D5 1983
Beginning in 4777 B.C., this chronology presents significant events and personalities in the history of the African continent and the peoples of the African diaspora, until 1888 when all of the slaves in Brazil were emancipated.
Chronology of African-American History: From 1492 to the Present
E185 .H64 1997 (Reference Desk Collection)
This one-volume reference work offers a listing of important facts related to all aspects of African American life in the United States from 1492 until around 1996.
Pan-African Chronology: A Comprehensive Reference to the Black Quest for Freedom in AFrica, the Americas, Europe and Asia
E 185.18 .J46 1996
Presents a chronology of Africana history in three separate volumes: Volume I: 1400-1865; Volume II 1865-1915; and Volume III: 1914-1929.
Timetables of African-American History
E 185 .H295 1995
This is a one-volume chronology of the most important people and events in black American history, from 1492 to 1992. The information is presented by year, and then further arranged into eight subject categories.
W. E. B. Du Bois (1868-1963) was a sociologist, historian, civil rights activist and prolific writer who penned many seminal works on the history of Afirican Americans, including The Philadelphia Negro (1899) and Black Reconstruction (1935). (Gelatin silver print c. 1911, National Portrait Gallery, Smithsonian Institution)