Stem miner (Diptera: Agromyzidae) in Asparagus

In 2023, I located linear mines on lower stems of the host in a garden bed in October, probably at least a month after the mines had been formed. In some cases, the mines were very narrow and pale green, while in other cases, the mines (evidently made by older larvae) were wider and whitish or light brown in color, with red discoloration along the margins. I examined one mine that contained the remains of a spent puparium under the epidermis of the stem, about 20cm above ground level. Tentative identification based on Spencer and Steyskal (1986).