Cerodontha (Dizygomyza) morosa (Meigen)

(Figs. 27, 130)

Material examined. MASSACHUSETTS: Berkshire Co., Alford, 12.vi.2015, em. 20.vi.2015, C.S. Eiseman, ex Carex leptonervia bract, #CSE1632, CNC564669 (1♂) ; Lenox, Mahanna Cobble, 23.vi.2016, em. 28.vi.2016, C.S. Eiseman, ex Carex gracillima, #CSE2644, CNC634778 (1♂) ; em. 30.vi–4.vii.2016, C.S. Eiseman, ex Carex hitchcockiana, #CSE2678, CNC654235, CNC654236 (1♂ 1♀).

Tentatively identified material. OKLAHOMA: Payne Co., Marena, 28.v.2016, em. 8–13.vi.2016, M.W. Palmer, ex Carex festucacea, #CSE2568, CNC634779 (1♀) ; Mehan, 36.014339° N, 96.996744° W, 6.v.2016, em. 8.v.2016, M.W. Palmer, ex Carex festucacea, #CSE2665, CNC634805 (1♀) .

Hosts. Cyperaceae: Carex * gracillima Schwein., C. * hitchcockiana Dewey, C. * leptonervia (Fernald) Fernald; numerous other Carex spp. in Europe. Spencer & Steyskal (1986) listed this species as feeding on C. crus-corvi Shuttlw. ex Kunze, but this was apparently in error since they indicated elsewhere that reared specimens are unknown in North America.

Leaf mine. (Fig. 130) A long, whitish corridor, changing direction a few times, with frass in a single blackish lump toward the leaf apex.

Puparium. (Fig. 27) Yellowish or reddish to blackish-brown; formed within the mine (Spencer & Steyskal 1986), glued to the floor toward the base of the leaf.

Distribution. USA: CA, *MA, MT; Spencer & Steyskal (1986) note that Frick’s (1959) records of IL, IN, MD and SD require verification; Europe.