Liriomyza virgo (Zetterstedt)

Eiseman, Charles S. & Lonsdale, Owen, 2019, New State and Host Records for Agromyzidae (Diptera) in the United States, with the Description of Ten New Species, Zootaxa 4661 (1), pp. 1-39 : 16

Liriomyza virgo (Zetterstedt)

( Figs. 22 , 52 )

Material examined. MASSACHUSETTS: Berkshire Co., Lenox, Parsons Marsh , 20.vi.2017, em. 2.vii.2017, C.S. Eiseman, ex Equisetum fluviatile , #CSE3887, CNC939734 (1♀) .

Hosts. Equisetaceae : Equisetum fluviatile L., E. palustre L. ( Lonsdale 2017).

Larval mine. ( Fig. 52 ) According to Ellis (2018), the egg is laid 1–2 cm from the tip of a lateral branch, and the larva mines basally from here, continuing down the stem. The mines we observed were entirely in the main stem, in some cases proceeding downward but in at least one instance reversing direction early on and mining mostly apically. They were uniformly brown, without obvious frass, and were essentially linear throughout (somewhat blotchy in places).

Puparium. ( Fig. 22 ) Black; formed at the end of the mine, standing at a 90° angle from the stem, with the posterior spiracular processes firmly anchored in the plant.

Distribution. USA: AK, * MA; Canada: AB, BC, MB, NT, ON, QC ( Lonsdale 2017).

Figures

FIGURES 14–26. Figs. 14–15: Liriomyza euphorbiella spec. nov.; 14: adult female; 15: puparium. Figs. 16–17: L. garryae spec. nov.; 16: adult male; 17: puparia. Figs. 18–19: L. phloxiphaga spec. nov.; 18: adult male; 19: puparium. Figs. 20–21: L. cf. trixivora Lonsdale; 20: adult male; 21: puparium. Fig. 22: L. virgo (Zetterstedt), puparium. Figs. 23–24: L. zinniae Spencer; 23: adult male; 24: puparium. Figs. 25–26: Phytomyza davisii (Walton); 25: adult male; 26: puparia.

FIGURES 46–56. leaf mines: 46: Liriomyza garryae spec. nov., on Garrya ovata; 47: same; 48: L. phloxiphaga spec. nov., on Phlox paniculata; 49: Liriomyza cf. taraxaci Hering, on Lactuca biennis (mine containing at least three larvae); 50: L. cf. trixivora Lonsdale, puparium in mine; 51: L. cf. trixivora, on Trixis californica; 52: L. virgo (Zetterstedt), on Equisetum fluviatile; 53: L. zinniae Spencer, on Encelia farinosa; 54: same, puparium in lower surface blister; 55: Liriomyza sp. 1, on Chaetopappa bellidifolia (young mine); 56: same (complete and vacated mine).