目的: 描述海南省红树林生境库蠓属（Culicoides）新种和新记录种。方法: 将2021－2022年采集自海南省红树林的库蠓属昆虫制作玻片标本，基于形态学特征进行物种鉴定，并对其主要鉴定特征进行拍摄、测量和绘图。结果: 在海南省清澜红树林省级自然保护区、东寨港国家级自然保护区发现1新种拟老挝库蠓（C. pseudolaoensis Deng & Li，sp. nov.），其主要鉴别特征为：雌虫大颚齿10枚，触角嗅觉器分布在第3、11~15节；中胸盾板浅黄色；小盾片褐色；翅基部淡斑大，向后延伸至臀室基部1/2；受精囊3个，椭圆形，位于中部的1个较大。雄虫阳茎中叶端部粗，柱状，阳基侧突基部末端粗壮。在铁炉港红树林自然保护区发现1中国新记录种拟心形库蠓（C. pseudocordiger Wirth & Hubert，1989），其主要鉴别特征为：足第4跗节呈心形；中胸盾板褐色，表面布满粗鬃；翅r₂室全部暗色；雄虫阳茎中叶基拱高且端部尖，阳基侧突端部弯曲且具长齿。新种模式标本保存于海南大学植物保护学院昆虫标本馆。结论: 记述了库蠓属1新种及1中国新记录种，进一步丰富了中国红树林生境的库蠓种类。

Objective: This study aimed to report a new species and a newly recorded species of Culicoides in the habitat of mangrove forests of Hainan Province, China. Methods: Slide specimens were prepared for the insects of the genus Culicoides collected from mangrove forests in Hainan Province in 2021-2022, and images, measurements, and drawings of the main identifying characteristics were obtained. Results: A new species, C. pseudolaoensis Deng & Li, sp. nov., was identified in Qinglan Provincial Nature Reserve of Mangrove Forest and Dongzhai Port National Nature Reserve in Hainan Province. Its main distinguishing characteristics were: female mandible with 10 teeth, sensilla coeloconica present on antennal segments 3 and 11-15; mesonotum yellowish; scutellum brown; wing with a large pale spots at base, extending backward to 1/2 of anal cell; 3 spermathecae, ovoid, with the middle one large and two lateral ones small. Male aedeagus with distal portion stout and columnar, parameres with basal portion stout. Besides, a newly recorded species, C. pseudocordiger Wirth & Hubert, 1989, was found in Tielu Harbor Nature Reserve of Mangrove Forests of Hainan Province. Its main distinguishing characteristics were: the fourth tarsomere cordiform, scutellum brown, surface covered with thick bristles, cell r₂ covered with a dark spot. Male aedeagus with arch high and distal portion pointed, distal portion of parameres curved, inner margin with long teeth. The type specimens of the new species were deposited in the Insect Collection of the College of Plant Protection, Hainan University. Conclusion: A new species and a newly recorded species of the genus Culicoides were reported in China, which further enriched the species diversity of Culicoides in the habitat of mangrove forests in China.