Liriomyza ptarmicae de Meijere

(Fig. 150)

Material examined. MASSACHUSETTS: Hampshire Co., Northampton, Mineral Hills, 28.ix.2013, em . 18– 25.x.2013, C.S. Eiseman, ex Artemisia vulgaris, #CSE946, CNC384797–384799 (1♂ 2♀); Pelham, 88 Arnold Rd., 11.vii.2017, C.S. Eiseman, mating on Artemisia ludoviciana 'Silver King', #CSE3916, CNC939704, CNC939705 (2♂) ; 8–11.vii.2017, em. 23–26.vii.2017, C.S. Eiseman, ex Artemisia ludoviciana 'Silver King', #CSE4004, CNC939693–939700 (4♂ 4♀).

Hosts. Asteraceae: Achillea millefolium L., A. sibirica Ledeb., Artemisia alaskana Rydb., A. ludoviciana Nutt., A. * vulgaris L., “ Chrysanthemum ” spp. (Spencer 1969; Spencer & Steyskal 1986; Lonsdale 2017).

Leaf mine. (Fig. 150) Whitish, upper surface; entirely linear, with frass in alternating black strips.

Puparium. Yellow-orange; formed outside the mine.

Distribution. USA: CA, CO, *MA, OR, WA; Canada: AB, BC, ON, NS, NT, YT; Europe.