Wyo. Stat. § 1-11-125
If a sufficient number of jurors duly selected and notified do not attend to form a jury the court shall direct the clerk to select a sufficient number of names from the base jury list to complete the jury and shall summon the persons selected to attend immediately or at a time fixed by the court. If for any reason a sufficient number of jurors to try the issue is not obtained from the persons notified, the court may make successive orders until a sufficient number is obtained. The court may excuse any juror so selected if it appears that, because of distance, the delay occasioned by summoning the juror and requiring his presence would unduly prolong empaneling the trial jury. Each person so notified, unless excused by the court, shall serve as a juror at the trial. For a neglect or refusal to serve he may be fined in the same manner as a trial juror regularly selected and notified and he is subject to the same exceptions and challenges as any other trial juror.
W.S. 1-11-125