Agromyza aristata Malloch

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 aristata Malloch

( Fig. 65 )

Material examined. OKLAHOMA: Payne Co., Mehan , 36.014339° N, 96.996744° W, 5.iv.2016, em. by 11.iv.2017, M.W. Palmer, ex Ulmus rubra , #CSE3448, CNC939912 (1♂) ; VERMONT: Chittenden Co. , South Burlington, Winooski Gorge, 16.v.2015, em . 24.iii–6.iv.2016, C.S. Eiseman, ex Ulmus rubra , #CSE2264, CNC654497–654499 (3♀).

Hosts. Ulmaceae : Ulmus americana L. ( Frick 1959), U. * rubra Muhl.

Leaf mine. ( Fig. 65 ) Usually beginning near the leaf margin; initially green and linear, later widening into a brown, elongate blotch. Frass is indistinct in the narrow, green portion, but later present in blackish particles that often form two rows, becoming more randomly scattered toward the end. Concentric feeding lines are evident in the blotch.

Puparium. Yellowish-brown; formed outside the mine.

Distribution. USA: AR (leaf mines only), FL (leaf mines only; Frost 1924), IL, IN, IA, NY, OH, *OK, PA, VA, *VT; Canada: AB, ON. We have also seen leaf mines (including photographs submitted to www.BugGuide.net) from MA, MD, NJ, NC, TN, WI, and NB.

Comments. This species is univoltine, with larvae feeding in April and May; pupae overwinter.

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.