Liriomyza orilliensis Spencer

(Figs. 146–147)

Material examined. MASSACHUSETTS: Berkshire Co., Stockbridge, Stock Mountain, 19.vi.2015, em. 3– 4.vii.2015, C.S. Eiseman, ex Prenanthes, #CSE1676, CNC564627, CNC564628 (2♀) .

Hosts. Asteraceae: * Prenanthes L., Taraxacum F.H. Wigg. (Lonsdale 2017) .

Leaf mine. (Figs. 146–147) Pale greenish, turning brownish; beginning as an irregular track along the leaf margin, gradually expanding to an elongate blotch; frass mostly in squiggly strips. In the single occupied mine found, three larvae fed side by side.

Puparium. Orange-brown; formed outside the mine.

Distribution. * USA: MA; Canada: AB, ON.

Comments. Our specimens are the first known females of this species.