Appearing yesterday afternoon before Superior Judge James L. Allen, Melba Dennis, Alice Turner Converse and Buell Tucker, C. C. Co. worker, all pleaded guilty to charges of contributing to the de linquency of a minor. All three of the defendants asked for pro bation. The Dennis and Converse women will have their hearings on their applications next Friday and Tucker will have his hearing for probation on the following Friday. Guillermo Rosales pleaded guilty to a charge of drunken driving and asked for probation. Hearing on his application was set for next Friday. Roy Johnson, also charged with drunken driving, will be ar raigned on the charge next Fri day.