Charges that a guidance counselor at a junior high school in Kensington contributed to the delinquency of minors by handing out marijuana and hashish to students during school hours were dismissed for lack of evidence yesterday at the request of prosecutors.

Melvin Charles Holober, 59, of Takoma Park, a guidance counselor at Newport Junior High who resigned from the school system six days before his arrest June 9, could not be reached for comment.

Dismissal of the charges came after Assistant Montgomery County State's Attorney Steven Savage told County District Judge John Tracy that the prosecution ahad none of the drugs that Holober was accused of giving his students. He said he did have statements from students that Holober had given them drugs, but that such statements could not be admitted as evidence.

Savage also told the judge that under the law in effect at the time of the arrest a showing would have to be made that the juveniles involved were delinquent or in need of supervision in order to prove that Holober contributed to deliquency. The prosecutor said he could not make such ashowing.

Holober's arrest followed what a police spokesman said was a two-month investigation condusted jointly by police and county school officials. Police declined comment yesterday on the dismissal of the charges.