Following are the 14 charges against D.C. Mayor Marion Barry and a summary of the evidence offered so far on each. The government is expected to finish its case on Tuesday. The defense has said it expects to call 10 to 15 witnesses. Conspiracy to possess cocaine, fall 1984 to Jan. 18, 1990.

Because every alleged act of possession is part of the conspiracy case, most of the prosecution's evidence on counts 2 to 14 is relevant. Additional evidence: logs of telephone calls Barry received from alleged co-conspirators and testimony by Hazel Diane "Rasheeda" Moore about "more than 100" episodes of drug use for which Barry has not been separately charged. Possession of cocaine, November 1987.

Georgetown restaurateur Hassan H. Mohammadi testified that, at Barry's request, he delivered cocaine to the mayor at Barry's office in the District Building just before Barry left town for the Bahamas. He also testified that he met Barry in Nassau and shared cocaine with him there. Another witness, Theresa Southerland, testified that she too used cocaine with Barry on the trip. Possession of crack cocaine, Sept. 7, 1988.

Lydia Pearson testified she sold three $30 bags of crack to Barry at the Frank D. Reeves Center on Sept. 7, 1988, the date written on a job application she said she gave to Barry the same day. Possesssion of crack cocaine, Dec. 16, 1988.

Charles Lewis testified that Barry arrived for a visit at the downtown Ramada Inn carrying a matchbox full of crack. Lewis said they smoked it.

Barry's defense sought to discredit Lewis, on this and the following counts, by eliciting inconsistencies on details and emphasizing that he testified against Barry in the hopes of a more lenient sentence for his own drug convictions. Possession of crack cocaine, Dec. 17, 1988.

Lewis testified that Barry again brought crack to the Ramada, this time in the cuff of a trouser leg. The two of them, Lewis said, improvised a crack pipe from a sherbet glass and aluminum foil. Possession of crack cocaine, Dec. 19, 1988.

Lewis testified that Barry sent $100 to the Ramada so that Lewis could buy a "working fifty," a wholesale quantity of crack. Lewis, who could not find a working fifty, said he bought two $20 packets of crack and invited James McWilliams to meet Barry in the hotel room. He said the three men watched a Monday night football game, with Barry joining Lewis in the bathroom periodically to smoke crack. McWilliams testified that he did not see Barry smoke crack but saw him with smoking paraphernalia in the bathroom and smelled the smoke.

Barry's defense sought to discredit McWilliams by pointing out that he had struck a deal with prosecutors. Possession of crack cocaine, Dec. 22, 1988.

Lewis testified that he offered crack cocaine to a Ramada maid, who declined and told her supervisors, who in turned summoned the police to investigate. Undercover officers were about to approach Lewis when the hotel discovered that Barry was in the room and asked the officers to leave, a hotel executive testifed.

Lewis testified that Barry brought a crack pipe in an overnight bag and that the two men smoked crack with it. Perjury.

This charge centers on Barry's denial, in January 1989 grand jury testimony, that he knew anything about Lewis's involvement with drugs. The evidence includes Barry's tape-recorded testimony, contradicted by the testimony of Lewis and McWilliams in counts 4,5,6 and 7. Four Virgin Islands women gave direct or circumstantial evidence in support of Lewis's testimony that Barry observed or participated in Lewis's drug use in the Virgin Islands.

During cross-examination, Barry's defense called attention to inconsistencies in the witnesses' accounts. Perjury.

This charge centers on Barry's denial in grand jury testimony that he ever gave Lewis drugs. The evidence is Barry's tape-recorded testimony, contradicted by the testimony of Lewis and McWilliams in counts 4, 5, 6 and 7. Perjury.

This charge centers on Barry's denial in grand jury testimony that he received any drugs from Lewis at the Ramada. The evidence is Barry's tape-recorded testimony, contradicted by the testimony of Lewis and McWilliams in counts 4, 5, 6 and 7. Possession of cocaine, Aug. 26, 1989.

Darrell Sabbs testified that he used cocaine with Barry on this date while he was a guest at a downtown hotel. Under cross-examination, Sabbs conceded he has a poor memory for dates, but prosecutors introduced Sabbs's hotel bill, which showed a call to Barry on Aug. 26. Possession of cocaine between Nov. 7 and Nov. 10, 1989.

This count is based on information provided by Barry associate Doris Crenshaw, who is expected to testify on Tuesday. Possession of cocaine between Jan. 1 and Jan. 18, 1989.

This count is based on information from Barry friend Bettye Smith, who is expected to testify on Tuesday. Smith, who has been called a reluctant witness, is under a court order and is facing a bench warrant for arrest if she does not appear voluntarily. Possession of crack cocaine, Jan. 18, 1990.

The FBI's Vista Hotel videotape, which shows Barry taking two long drags from a crack pipe, is the prosecution's centerpiece on this count. This is also the only count for which prosecutors offered physical evidence of drug possession: two crack pipes and a leftover rock of crack. Rasheeda Moore, who appears with Barry on the tape, faced lengthy cross-examination by defense lawyer R. Kenneth Mundy, who is trying to show that Barry was entrapped by Moore. Mundy also pointed to deals Moore struck with the government and the money she has received while in the federal witness protection program. -- Compiled by Barton Gellman and Michael York