Phytomyza aralivora Spencer

(Fig. 178)

Material examined. MASSACHUSETTS: Franklin Co., Northfield, Crag Mountain, 21.viii.2016, em. 9– 14.ix.2016, C.S. Eiseman, ex Aralia nudicaulis, #CSE2984, CNC654113–654118 (2♂ 4♀) ; Worcester Co., Ashburnham, 20.vii.2016, em. 5–7.viii.2016, C.S. Eiseman, ex Aralia nudicaulis, #CSE2847, CNC654238– 654241 (3♂ 1♀) .

Host. Araliaceae: Aralia nudicaulis L. Spencer (1969) also listed A. racemosa L. as a host but did not cite reared specimens or even empty leaf mines to support this record.

Leaf mine. (Fig. 178) Upper surface, whitish to pale green; long and linear mine, widening to 2.5–3 mm by the end, with frass in fine, scattered black grains.

Puparium. Dark grayish-brown to black; formed outside the mine, sometimes loosely attached to the upper leaf surface near the exit slit (Fig. 178).

Distribution. USA: *MA, MT; Canada: AB, QC (empty leaf mines only). Photographs posted to www.BugGuide.net show leaf mines from IA, ME, NH, NY, VT, ON, and SK.