Jeremy and Joseph Benthall were the tiniest babies ever born at Washington's Columbia Hospital. Attending doctors told their mother at the time that 17-ounce Jeremy and 22-ounce Joseph had little chance for survival. They were placed in incubators and given intensive around-the-clock care.

Late Wednesday afternoon, the boys were taken home by their mother, Brenda Benthall, a hairdresser at the Cannon House Office Building. With Jeremy now weighing 4 pounds, 6 ounces and Joseph weighing 4 pounds, 11 ounces, a hospital spokesman said they no longer need special monitoring.

However, they have been enrolled in a special Children's Hospital clinic for infants who have difficulty breathing while asleep. They also will be checked by a clinic at Columbia. TT wo weeks ago, James R. VinT son resigned as Arlington County's real estate tax assessor to take a job at nearly twice his $45,801 salary with a real estate company in White Plains, N.Y.

But the new job entailed too much travel, and Vinson asked Anthony Griffin, the acting Arlington County manager, for the assessor's job back. He got it, and will return next Monday, Griffin said yesterday.

Vinson was the central figure in a dispute between the county and the owners of rental apartments over the level of assessments. The owners contended they were abnormally high. County Board members upheld Vinson, saying a change of assessment standards would require state legislation or court action. FF ollowing a disclosure that VirF ginia will drop nearly 50,000 indigents from its Medicaid rolls, a state legislator announced yesterday that he will try to amend a regulation that terminated assistance for an elderly constituent because she got a cost-of-living increase in the Social Security check that is her only income source.

"This is just outrageous," Del. Floyd Bagley (D-Prince William) said of the case of an 84-year-old unidentified Triangle widow who needs $80 worth of prescribed medicine every month. When her Social Security check was increased by $25, Bagley said it put her over the maximum "unearned income" permitting Medicaid assistance. That left her $55 in the hole.

Bagley said she tried to revoke the $25 benefit increase, but was told that was impossible.

"She worked over 40 years to qualify for these Social Security benefits," Bagley said. "They called it unearned income. I say she sure as hell earned it." FF or years, the District of ColumF bia government has been trying to persuade foreign chanceries to locate in outlying parts of the city remote from fashionable and traffic-clogged Embassy Row. Now, quietly, the government of the Federated States of Micronesia has done just that. It has located its Washington diplomatic office at 706 G St. SE, just down the block from the Marine Barracks.

Micronesia is a group of 700 far-flung islands in the southwest Pacific that came under U.S. trusteeship after World War II. Its 76,000 citizens now enjoy self-government under what is called "free association" with this country.CC ora Tucker admits she has litC tle chance of becoming Virginia's 74th governor, but she hasn't given up campaigning. A black protest candidate from Halifax County, she told a forum in Norfolk that there is little difference between the two major party candidates.

She contended that Democrat Charles S. Robb's election might prove more "disastrous" than Republican J. Marshall Coleman's because Democrats would see it as proof that only conservatives can win. Robb "is talking about building a Virginia 'worthy of its past'," she said, asking: "Who would want to go back to the racist past in Virginia?" TT here will be lots of masked T spooks on the Metro subway Saturday. A Detroit-based brewery, Stroh's, is sponsoring a noon-to-midafternoon "masquerade saloon chase" to raise money for muscular dystrophy research, which requires participants to travel among 20 participating watering holes by public transit. If successful, the dystrophy organization will gain $20,000. Metro will collect at least $4.60 in fares from each entrant.