More than 150 youths working in the D.C. Summer Youth Employment Program failed to receive their pay checks as scheduled last Wednesday, but city officials said they hope to resolve the underlying problems by Monday.

Officials noted that the number of youths not paid is small compared to the 11,000 who did receive checks, and the 150 are expected to get theirs Monday. Another 7,300 youths who started later in the program will receive their first paychecks later this months.

Mix-ups this week included assignment of older youths to worksites with lower age limits, work-hour disputes and delays in time card submissions, said Matt Shannon, director of operations for the Department of Employment Services.He said program officials will work with each worksite supervisor to correct the problem.

Supervisors for at least 15 sites reported that workers either failed to receive paychecks or were paid for fewer hours than they had worked. Sixty-seven of the 191 youths at the Washington Street Work Project, for example, did not get their checks on time, said project executive director Debbie Shore. The remaining 114 received their correct pay, she said.

The summer program, which provides jobs for 18,300 youths, allowed more than 21,900 to register because of expected attrition. But many of the surplus registrants may not get jobs.

"We will be sending out letters to kids whose chances look dim" once all slots are filled, said Jackie Threadgill, public relations director for the department. She said the program will select registrants to fill slots created by attrition on the basis of registrants' financial need.

India Mack, 16, of 210 L St. NW, said she signed up in April, attended an orientation session on June 29, but has not yet received a job. Until she hears from the program again, she said she plans to stay at home and watch her younger sister.

"I hope a job comes through. I do want a job . . .," she said.