Liriomyza baccharidis Spencer

(Fig. 135)

Material examined. OKLAHOMA: Payne Co., Mehan, 36.014339° N, 96.996744° W, 24.iv.2016, em. by 12.v.2016, M.W. Palmer, ex Erigeron annuus, #CSE2654, CNC653994 (1♂) ; TEXAS: Edwards Co., 1.3 miles NW of Campwood, 16.iii.2017, em . 7.iv.2017, C.S. Eiseman, ex Baccharis salicifolia, #CSE3407, CNC941275 (1♂).

Hosts. Asteraceae: Artemisia douglasiana Besser, Aster sp. (cultivated), Baccharis douglasii DC., B. pilularis DC. (empty leaf mines only), B. *salicifolia (Ruiz & Pav.) Pers., Erigeron * annuus (L.) Pers., E. canadensis L. (Spencer 1981; Lonsdale 2011).

Leaf mine. (Fig. 135) According to Spencer (1981), a “dark, upper surface linear mine which not infrequently starts at the apex of a leaf and there appears blotch-like”; frass is in black strips. The mines on Erigeron annuus were whitish and entirely linear, 1–2 mm wide at the end, at least some of them switching between the upper and lower leaf surfaces.

Puparium. Orange (Spencer 1981); formed outside the mine.

Distribution. USA: AZ, CA, ID, *OK, *TX, WA; Canada: BC; Colombia; Venezuela.