The morphology and formation of stylostomes (feeding tubes) in hosts’ body during the parasitic phase of Allothrombium fuliginosum (Hermann) larvae were studied for the first time with light microscopy (LM) and transmission electron microscopy (TEM). The stylostomes were observed in three aphids species—Acyrthosiphon pisum (Harris), Elatobium abietinum (Walker), and Macrosiphum rosae (L.)—parasitized by mites under laboratory conditions. They consisted of 2–6 main branches, preliminarily unbranched, then producing secondary and sometimes also tertiary branches as finally formed structures. Their walls were uniformly electron-dense, without any longitudinal and transverse stratifications and showed rather irregular outlines. Distally, the stylostome branches revealed transparent pores and cavities in their walls, connecting the stylostome canal with surrounding haemocoelic space. The total length of stylostomes at the end of the parasitic phase was on average 16× greater than that recorded in the youngest stylostomes. No differences in the overall shape of feeding tubes between host species were stated. The stylostomes formed in different host species did not differ significantly, except their total length, which attained the highest value in tissues of Ac. pisum.

首次利用光学显微镜（LM）和透射电子显微镜（TEM）研究了黄花Allothrombium fuliginosum（Hermann）幼虫寄生阶段寄主体内的茎突（饲养管）的形态和形成。在三种蚜虫种类中都观察到了花柄，这三种蚜虫为：蚜蚜（Acyrthosiphon pisum）（哈里斯），白屈菜（Elatobium abietinum）（沃克）和蔷薇（Macrosiphum rosae）。（L.）-在实验室条件下被螨虫寄生。它们由2–6个主要分支组成，这些分支最初是未分支的，然后产生了二级分支，有时还形成了第三级分支，最终形成了结构。它们的壁是均匀的电子致密的，没有任何纵向和横向分层，并且显示出相当不规则的轮廓。在一定程度上，手写笔的分支在其壁上显示出透明的孔和腔，将手写笔的运河与周围的血结肠空间相连。在寄生阶段结束时，平均截骨的总长度比最年轻的截骨的总长度长16倍。宿主物种之间的饲管总体形状没有差异。在不同寄主物种中形成的花柱没有明显差异，只是它们的总长度不同，交流 豌豆。