Calosoma sycophanta L. is a voracious predatory beetle that feeds on several important lepidopteran pests such as the gypsy moth (Lymantria dispar L.), the brown-tail moth (Euproctis chrysorrhoea L.) and the pine processionary moths (Thaumetopoea pityocampa). It is mass reared in laboratory breeding and released against forest pests. So, C. sycophanta are important predators with the potential to be used in the biological control in agriculture. Although some studies provide important data on the gut anatomy in Carabidae, they are limited to few species. In the present study, we investigated the structure of the Malpighian tubules and digestive tract by means of light and electron microscopies. According to the results obtained, in C. sycophanta, the digestive tract consists of 3 basic parts: foregut, midgut and hindgut. The foregut consists of the oral cavity, pharynx, esophagus, crop, and proventriculus. The esophagus is tubular and has a convoluted surface. Crop bulb-like is an enlarged channel. The proventriculus is connected to the mid-gut. The midgut extends from the foregut at the anterior end to the hindgut at the posterior end. Midgut surface is densely covered with crypts which is finger-shaped. The hindgut consists of the ileum, the colon and the rectum. The anterior end of ileum is marked by the entrance of the four Malpighian tubules. Malpighian tubules are surrounded by a monolayer cubic epithelium. Colon is located between the posterior end of the ileum and the anterior of the rectum. The rectum is lined lumen, intima, a single layer convoluted epithelium and a muscle layer. In addition, in this species, a pair of anal gland, anal gland reservoir and thin-long reservoir ducts are connected with the genital chamber. These data are discussed in comparison with the digestive tract in other Coleopteran species.

中文翻译：

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Malpighian 小管的组织解剖学和生物防治剂 Calosoma sycophanta L. 成虫的消化道（鞘翅目：Carabidae）

Calosoma sycophanta L. 是一种贪婪的掠食性甲虫，以几种重要的鳞翅目害虫为食，如吉普赛蛾 (Lymantria dispar L.)、褐尾蛾 (Euproctis chrysorrhoea L.) 和松树蛾 (Thaumetopoea pityoacamp)。它在实验室繁殖中大量饲养，并释放以对抗森林害虫。因此，C. sycophanta 是重要的捕食者，具有用于农业生物防治的潜力。尽管一些研究提供了有关 Carabidae 肠道解剖学的重要数据，但它们仅限于少数物种。在本研究中，我们通过光学和电子显微镜研究了马氏小管和消化道的结构。根据获得的结果，在 C. sycophanta 中，消化道由 3 个基本部分组成：前肠、中肠和后肠。前肠由口腔、咽部、食道、胃部和胃部组成。食道呈管状，表面呈螺旋状。作物球茎状是一个扩大的渠道。胃与中肠相连。中肠从前端的前肠延伸到后端的后肠。中肠表面密布着指状隐窝。后肠由回肠、结肠和直肠组成。回肠前端的标志是四个马氏小管的入口。Malpighian 小管被单层立方上皮包围。结肠位于回肠后端和直肠前端之间。直肠内衬有管腔、内膜、单层回旋上皮和肌肉层。此外，在这个物种中，一对肛门腺，肛腺蓄水池和细长蓄水管与生殖腔相连。这些数据与其他鞘翅目物种的消化道进行了比较。