【目的】明确白斑新灰蝶Neolycaena tengstroemi (Erschoff, 1874)的生物学特性。【方法】结合野外调查和室内饲养的方法，观察记录白斑新灰蝶的生长发育过程及行为特性。【结果】在宁夏地区，该蝶1年1代，以卵越冬，3月下旬至5月中旬都可见到幼虫；老熟幼虫在柠条根基周围的枯枝落叶层下化蛹，蛹期平均为15 d；5月下旬始见成虫，6月上旬到7月初仍可见到成虫活动；6月上旬开始产卵，卵期为295 d。【结论】白斑新灰蝶幼虫取食寄主叶芽和花器，是危害柠条锦鸡儿的重要害虫。

[Objectives]  To clarify the biological characteristics of Neolycaena tengstroemi (Erschoff, 1874). [Methods]  The morphology, life history, and behavior, of N. tengstroemi were described systematically by field studies and captive rearing. [Results]  N. tengstroemi has one generation each year and overwinters as eggs in Ningxia. Larvae emerge from late March to mid-May. In early May, last instar larva begin crawling down to the litter layer or surface soil around host plant roots to pupate; the average length of the pupal stage is 15 days. Adults emerge in late May with a peak of emergence at the beginning of June. Adults lay eggs in early June and the duration of the egg stage is about 295 days. N. tengstroemi can both oversummer and overwinter as eggs in the soil or litter layer. [Conclusion]  The larvae of N. tengstroemi feed on flowers and leaf buds of host plants and are an important pest of Caragan korshinskii in Ningxia.