【目的】 明确双斑长跗萤叶甲Monolepta hieroglyphica在吉林省种群发生动态和分布特点，以及玉米与豆类作物间作对其影响。【方法】 采用田间罩网法，比较9种种植模式对双斑长跗萤叶甲羽化数量、体长、体重的影响及其分布特点。【结果】 吉林省双斑长跗萤叶甲成虫种群发生动态为单峰曲线，始见期为7月上旬，雌虫占比较低，羽化高峰期在7月中下旬，雌虫占比开始上升，在羽化后期，雌虫占比超过75%；雌虫体长及体重显著高于雄虫（P<0.05），同年8月份羽化的雌虫体长及体重、雄虫体重显著高于7月份羽化的成虫（P<0.05）；单独种植大豆或绿豆并不能抑制双斑长跗萤叶甲种群数量，但玉米间作大豆或绿豆能够显著降低雌虫体长和体重（P<0.05）。【结论】 吉林省玉米田双斑长跗萤叶甲自7月上旬始发生，呈增长趋势，在7月中下旬到达羽化高峰期后开始逐渐下降，9月中旬未见有新成虫羽化；玉米田雌虫体长及体重显著高于雄虫，且雌虫体长、体重及雄虫体重与羽化时间密切相关，后期羽化成虫显著高于早期羽化成虫；玉米-豆类间作可用于调控双斑长跗萤叶甲的个体生长。

 [Aim]  To assess the effect of intercropping maize and legumes on the population dynamics and distribution of Monolepta hieroglyphica adults in Jilin Province. [Methods]  The field netting method was employed to compare the effects of nine planting patterns on the abundance, body length, body weight, and distribution, of emerged adults. [Results]  The emergence of M. hieroglyphica adults followed a unimodal curve in Jilin Province, with peak emergence occurring from mid to late July. The proportion of female adults was initially less than 35%, increasing to over 75% in the late emergence period. Females had a significantly greater body length and weight than males (P<0.05). Adults were markedly longer and heavier in August than in July (P<0.05). Monocultures of soybeans, or mung beans, did not reduce body length or weight, whereas intercropping with legumes significantly reduced female body length and weight (P<0.05). [Conclusion]  In maize fields in Jilin Province, adult M. hieroglyphica began to emerge in early July, reached peak abundance in mid-late July, and then gradually declined. Female adults were significantly longer and heavier than males. Both body length and weight were closely associated with emergence time, with females that emerged later being significantly longer, and heavier, than those that emerged earlier. Intercropping maize with legumes can reduce the body length and weight of adult female M. hieroglyphica.