During metamorphosis, the insect CNS undergoes both structural and allometric changes. Due to their extreme de-embryonization and parasitism, the formation of the CNS in egg parasitoids occurs at the late larval stage. Our study provides the first data on the morphological and volumetric changes of the CNS occurring during the pupal development of the parasitic wasp Trichogramma telengai Sorokina, 1987 (Trichogrammatidae). The prepupal–pupal development includes fusion and concentration of ganglia achieved by the loss of connectives. Volumetric analysis shows that during the pupal development the absolute body volume and CNS volume gradually decrease. The brain and thoracic synganglion slightly increase in volume during the pupal period and extremely decrease from late pupa to adult. The CNS neuropil volume increases from prepupa to adult. The mean cell diameter also decreases during the metamorphosis of the nervous system. The cell body rind volume decreases during pupal development; this decrease correlates with the decrease in the number of cells on the one hand and increase in the neuropilar volume on the other hand.

在变态过程中，昆虫中枢神经系统经历结构和异速生长的变化。由于它们极端的脱胚和寄生，卵寄生物中中枢神经系统的形成发生在幼虫后期。我们的研究提供了关于寄生蜂Trichogramma teleengai蛹发育过程中中枢神经系统形态和体积变化的第一个数据Sorokina，1987（赤眼蜂科）。前蛹 - 蛹发育包括通过失去结缔组织实现的神经节融合和集中。体积分析表明，在蛹发育过程中，绝对体积和中枢神经系统体积逐渐减小。蛹期脑和胸神经节的体积略有增加，从蛹后期到成虫则极少。从 prepupa 到成年，CNS 神经纤维体积增加。在神经系统的变形过程中，平均细胞直径也会减小。蛹发育过程中胞体外皮体积减少；这种减少一方面与细胞数量的减少有关，另一方面与神经毛体积的增加有关。