Phytomyza penstemonis 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 : 80-81

Phytomyza penstemonis Spencer

( Fig. 199 )

Material examined. CONNECTICUT: Litchfield Co., Canaan , Falls Village , 24.vi.2015, em . 24–27.vii.2015, C. Vispo, ex Penstemon digitalis , #CSE2171, CNC564664, CNC564665 (1♂ 1♀); 21.vii.2015, em. 10.viii.2015, #CSE2164, CNC564675, CNC564676 (2♀); 17.ix.2015, em. 30.ix.2015, C. Vispo, ex Penstemon , #CSE2173, CNC564663 (1♀); NEW YORK: Columbia Co., Ghent , 17.vii.2015, em . 27.vii.2015, C. Vispo, ex Penstemon , #CSE2174, CNC564682 (1♀).

Hosts. Plantaginaceae : Penstemon confertus Douglas ex Lindl., P. * digitalis Nutt. ex Sims, P. laxiflorus Pennell , P. procerus Douglas ex Graham ( Spencer 1969; Sehgal 1971; Spencer & Steyskal 1986). We have found probable mines of this species on P. pseudospectabilis M.E. Jones.

Leaf mine. ( Fig. 199 ) Whitish, entirely linear; primarily on the upper surface but often with the final portion on the lower surface; frass in dark strips along the sides.

Puparium. White (yellowish according to Spencer (1969)), formed within the leaf, the anterior spiracles projecting ventrally through the lower epidermis.

Distribution. USA: CA, *CT, MS, *NY; Canada: AB. We have seen probable mines of this species (including photographs submitted to www.BugGuide.net) in AZ and WI.

Figures

FIGURES 189–199. leaf mines; 189: Phytomyza hatfieldae spec. nov. in Osmorhiza claytonii; 190: P. hydrophyllivora spec. nov. in Hydrophyllum canadense; 191: P. hydrophyllivora in Hydrophyllum virginianum (yellow puparium at tip of leaf serration, upper right); 192: P. linnaeae (Griffiths) in Linnaea borealis (transmitted light); 193: P. loewii Hendel in Clematis virginiana; 194: P. minuscula Goureau in Thalictrum pubescens; 195: P. omlandi Scheffer & Lonsdale in Gelsemium sempervirens; 196: P. palmeri spec. nov. in Symphoricarpos orbiculatus (transmitted light; puparium at upper left); 197: P. palustris spec. nov. in Micranthes pensylvanica; 198: same, five brown puparia in blisters on lower leaf surface (whitish object along left side of midrib is a coniopterygid cocoon); 199: P. penstemonis Spencer in Penstemon digitalis.