Fig. 1 ... d, galls on twig of Tilia americana [click below to see drawing, which takes the place of a description of the gall in words]
”- Couden, F. D. : (1908) A gall-maker of the Family Agromyzidae (Agromyza tiliae, n. sp.)©
Reference: https://www.biodiversitylibrary.org/item/54606#page/46/mode/1up