Aulagromyza cornigera (Griffiths)

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 : 8

Aulagromyza cornigera (Griffiths)

( Figs. 6, 7 , 37 )

Material examined. MASSACHUSETTS: Franklin Co., Northfield, Dickinson St. , 10.v.2016, em. 6.iv.2017, C.S. Eiseman, ex Lonicera × bella, #CSE3399, CNC939724–939726 ; Hampshire Co., South Hadley, Lithia Springs Rd. , 11.v.2016, em. 4–5.iv.2017, C.S. Eiseman, ex Lonicera morrowii , #CSE3381, CNC939687–939690 (1³ 2♀ 1 pu- parium) .

Hosts. Caprifoliaceae : Lonicera *×bella Zabel, L. ciliosa (Pursh) Poir. ex DC. (leaf mines and larvae only), L. dioica L. (leaf mines and larvae only), L. involucrata (Richardson) Banks ex Spreng. , L. morrowii A. Gray , L. tatarica L. (leaf mines and larvae only), Symphoricarpos albus (L.) S.F. Blake (Spencer 1969, 1981; Sehgal 1971; Griffiths 1973; this species is treated as Paraphytomyza lonicerae (Robineau-Desvoidy) in the older two references). We have also seen leaf mines on Lonicera caerulea L., L. japonica Thunb. , and L. maackii (Rupr.) Herder, and Craves (2018) found them on Triosteum perfoliatum L.

Leaf mine. ( Fig. 37 ) White to greenish-white, broadly linear, with frass in discrete black lumps. Larvae avoid crossing the midrib except toward the apex, and as a result the mine tends to more or less follow the leaf margin.

Puparium. ( Fig. 7 ) Brown, with deep intersegmental grooves; formed outside the mine.

Distribution. USA: CA, KS, * MA; Canada: AB ( Sehgal 1971), BC (leaf mines and larvae only), ON (leaf mines and larvae only), SK; Europe. We have also seen leaf mines (including photographs posted to www.Bug- Guide.net) in CT, MD, MI, MN, NJ, NY, and OH.

Comments. This species is univoltine, with larvae mostly present in early May (as early as 29 March in New Jersey ( Alexander 2012)); the latest date larvae have been reported is 3 June, in Ottawa (Spencer 1969). Our adults emerged three to five days after the puparia were removed from winter refrigeration.

Figures

FIGURES 6–13. Figs. 6–7: Aulagromyza cornigera (Griffiths); 6: adult male; 7: puparium. Figs. 8–9: Calycomyza enceliae Spencer; 8: adult female; 9: puparium. Figs. 10–11: Calycomyza smallanthi spec. nov.; 10: adult male; 11: puparia. Fig. 12: Cerodontha (Dizygomyza) magnicornis (Loew), adult female. Fig. 13: Cerodontha (Icteromyza) longipennis (Loew), puparium.

FIGURES 34–45. leaf mines: 34: Agromyza princei spec. nov., on Rubus occidentalis; 35: Ophiomyia antennariae spec. nov., on Antennaria plantaginifolia; 36: same; 37: Aulagromyza cornigera (Griffiths), on Lonicera x bella; 38: Calycomyza enceliae Spencer, on Encelia farinosa; 39: Calycomyza smallanthi spec. nov., on Smallanthus uvedalius, young mine with evident linear portion; 40: same, young mine containing several larvae; 41: the same mine, complete and vacated; 42: Cerodontha (Icteromyza) longipennis (Loew), on Carex pseudocyperus; 43: same (detail showing puparium in transmitted light); 44: Liriomyza euphorbiella spec. nov., on Euphorbia cyathophora (reflected light); 45: same (transmitted light).