Agromyza bispinata Spencer

Eiseman, Charles S. & Lonsdale, Owen, 2018, New state and host records for Agromyzidae (Diptera) in the United States, with the description of thirty new species, Zootaxa 4479 (1), pp. 1-156 : 8

Agromyza bispinata Spencer

( Fig. 66 )

Material examined. IOWA: Winneshiek Co., Cresco , Cold Water Creek Rd. , 43°25'55.97"N, 92° 0'34.78"W, 16.vii.2015, em . 7.viii.2015, C.S. Eiseman, ex Elymus hystrix , #CSE1973, CNC564662 (1♂).

Host. * Poaceae : Elymus hystrix L.

Leaf mine. ( Fig. 66 ) In the single example observed, three eggs were inserted in a cluster in the basal portion of a leaf, near the middle, and the larvae mined distally, forming gradually widening tracks that eventually merged. In the young mines, black frass particles formed two rows, delineating a green central area; the margins of the mines were whitish.

Puparium. Reddish-brown; formed outside the mine.

Distribution. USA: GA, *IA, MD, NC, NY, UT, VA; Canada: ON.

Comments. Spencer (1969) reported a broad, white mine, up to three inches long, produced by an unidentified Agromyza species on Elymus hystrix in Ontario. Otherwise, the only previous record of an Agromyza species on Elymus is that of A. ambigua Fallén (as A. niveipennis Zetterstedt ) from E. repens (L.) Gould (as Agropyron repens (L.) Beauv.) ( Frick 1959; Spencer & Steyskal 1986).

Figures

FIGURES 63–74. leaf mines; 63: Agromyza albitarsis Meigen in Populus balsamifera; 64: A. ambrosivora Spencer in Helianthus annuus; 65: A. aristata Malloch in Ulmus rubra; 66: A. bispinata Spencer in Elymus hystrix; 67: A. diversa Johnson in Laportea canadensis; 68: A. fission spec. nov. in Celtis occidentalis; 69: A. idaeiana Hardy in Geum macrophyllum; 70: A. isolata Malloch in Populus balsamifera, young mines (left) with probable A albitarsis mine at leaf margin; 71: same Populus balsamifera leaf with completed mines, A. isolata to left of midrib and probable A. albitarsis to right; 72: A. parca Spencer in Dichanthelium clandestinum; 73: A. pseudoreptans Nowakowski in Urtica dioica; 74: A. pudica in Dichanthelium scoparium.