Dayne J. Barnhard, arrested on drug charges in October 1980, is again in the custody of Fairfax County authorities after a hiatus that began in April 1981 when he skipped a $200,000 bond, Fairfax County police said yesterday.

Barnhard, who was charged with possession of marijuana and several pounds of cocaine valued at more than $160,000, lived under an alias and traveled to such varied climes as Calgary, Canada, and Maui, Hawaii, before his arrest in Maui early this month, officials said.

By failing to appear in court to face the drug charges, Barnhard, 37, was responsible for one of the largest bond forfeitures ever in Fairfax County, Commonwealth's Attorney Robert F. Horan Jr. said yesterday.

"He ranks as one of our most wanted fugitives," said Fairfax police spokesman Warren Carmichael. "That's within the context that in Fairfax County we do not have that many fugitives."

Barnhard waived extradition from Maui, and Saturday returned to Northern Virginia, where he is being held at the Fairfax County jail on drug charges and two counts of failing to appear in court, Carmichael said.

A former resident of Oxon Hill, Barnhard posted bond minutes after his 1980 arrest and never spent time in jail. Informants told authorities that shortly after his release, Barnhard was spotted at an unspecified area airport.

Fairfax police heard reports placing Barnhard in several locations, including an island in the Caribbean, but lost track of him until late this summer when police in Calgary notified them that a man the Calgary officials believed to be Barnhard was wanted on assault charges there, Carmichael said.

Barnhard, living under the alias Reginald Casselberry, left town before being arrested, a spokesman for the Calgary police said yesterday.

Fairfax police, in conjunction with the Calgary Crime Stoppers program, distributed pictures of Barnhard to the Calgary media, producing numerous tips that he had moved to Hawaii, Carmichael said.

On Dec. 6, said Lt. H. Bell of the Maui police, Barnhard was arrested at a stakeout at the Kahuli Industrial Park, where he was working.