Liriomyza sp. 3

(Fig. 160)

Material examined. MASSACHUSETTS: Berkshire Co., Sheffield, 9.vii.2014, em. by 28.vii.2014, C.S. Eiseman, ex Bidens frondosa, #CSE1210, CNC384879 (1♀) .

Host. Asteraceae: Bidens frondosa L.

Leaf mine. (Fig. 160) Whitish, discoloring brownish; entirely linear, but contorted to form a secondary blotch that fills the apical portion of the leaf, broken here and there by slivers of intact green tissue. Frass is in a narrow, nearly continuous black trail.

Puparium. Yellowish; formed outside the mine.

Comments. Our single specimen is relatively pale in coloration and reared from Bidens, suggesting Liriomyza trifolii (Burgess), but the female cannot be confidently identified in the absence of males. We have found very similar mines on other Asteraceae, e.g. on Ageratina altissima (L.) R.M. King & H. Rob. in Ohio and on Mikania scandens (L.) Willd. in Massachusetts.