汉中地区农田优势种为长尾管蚜蝇和黑带食蚜蝇。
Eristalis tenax and Episyrphus balteatus are predominant species in the local farmland .
黑带食蚜蝇在体型大小方面同样存在差异,这些变异的多态性可能是食蚜蝇系统学研究中异名产生的一个重要原因。
There was also plasticity in body size . These variations may be one of the main causes of synonymy .