The paper aimed to explore the anatomical structure of digestive tract of female and male adults of Holotrichia oblita Fald. through optical microscopy and scanning electron microscope (SEM). The results showed that the foregut of digestive tract consists of mouth, pharynx, oesophagus, crop and proventriculus. The crop was well developed and cylinder shaped with its inner surface showing ruffling structure. The proventriculus had hair-like structure on the inner membrane. The mid gut was long with rich microvilli and spherical micro-protrusions on the inner surface, besides, small amount of goblet cells also distributed on the inner surface. The hindgut includes ileum, colon and rectum. The rectum had well developed rectal pads. No difference was found in characteristics of digestive tract between the male and the female adults. The results provide evidence that the structure features of digestive tract of Holotrichia oblita Fald. are adapted to its digestion, feeding behavior and inhabiting habit.%运用光学显微镜和扫描电子显微镜对华北大黑鳃金龟(Holitrica oblita Fald.)雌、雄成虫消化道进行了解剖观察.结果表明:华北大黑鳃金龟雌、雄成虫消化道组织形态学特征无明显差异,消化道前肠包括口、咽喉、食道、嗉囊和前胃,其中嗉囊分化发达,圆柱状,内表面皱褶状,前胃内膜特化形成毛状结构;中肠较长,内表面具有发达的微绒毛和圆球形微型突起,另外还有少量杯状细胞分布;后肠包括回肠、结肠和直肠三部分,直肠具有发达的直肠垫,华北大黑鳃金龟消化道组织形态学特征与其消化、取食、栖居等生理特征和生活习性相适应.
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