A Falls Church man pleaded guilty yesterday to robbery and conspiracy charges in connection with a wave of "Butch and Sundance" armed holdups of Northern Virginia pharmacies earlier this year.

Calvin Hewitt Fulmer II, 28, was convicted by Fairfax County Circuit Court Judge F. Bruce Bach of robbery in the July 19 holdup of the Boulevard Medical Center at 8301 Arlington Blvd. in Fairfax during which about $600 in drugs and cash were taken.

Fulmer was also convicted of conspiracy to commit robbery in that holdup and four others that took place last spring and summer.

Fulmer, who police said drove the getaway car during the five robberies, faces possible sentences of from five years to life for his robbery conviction and one to 10 years for the conspiracy charge. He is in Fairfax County jail awaiting sentencing Oct. 26.

Fulmer was one of three men arrested in August in connection with a dozen pharmacy holdups each committed by a pair of armed robbers, one black and one white who victims said were polite, calm and professional as they went about their business.

In each case, the robbers demanded morphine-based, controlled drugs and emptied the pharmacies' cash registers and safes. The racial mix of the robbers and their technique prompted authorities to dub them "salt and pepper" or "Butch and Sundance."

Police put the total figure for stolen goods in the robberies at up to $7,000.

Fulmer, who lives at 2839 Marshall St., and Terry Lee Snow, 30, who police said has no fixed address, were arrested by Fairfax police early in August. Both are white.

Later in the month, a black man, 29-year-old Wilbert Lee, of 1220 12th St. NW in the District of Columbia, was arrested by District police in connection with the robberies. Snow and Lee are awaiting trial in Fairfax County.

County police spokesman Warren Carmichael said yesterday the investigation into the robberies was continuing and that police have not ruled out the possibility that one or more other persons may also have been involved.