11. This univoltine species overwinters in the larval stage. 12. Below the subalpine level, however, it is Sierra Nevada, which is univoltine . 13. All species are univoltine , meaning they deposit their eggs at one time and then die. 14. Under such trees the abandoned cases may be numerous, and indicate that the adult univoltine . 15. Most lepidopterans in temperate climates are univoltine , while in tropical climates most have two seasonal broods. 16. Green hairstreaks overwinter as pupae and are univoltine , having one generation of adult butterflies per year. 17. It is univoltine in Scotland and the flight period is late May to the end of July. 18. Workers are univoltine ( i . e . they produce just one generation of ants each year ). 19. It is a univoltine species, laying one brood of eggs per year, generally in the fall. 20. "T . eques " is univoltine , producing only one brood of offspring per year.