Phytomyza loewii Hendel

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 : 77

Phytomyza loewii Hendel

( Figs. 48 , 193 )

Material examined. MASSACHUSETTS: Franklin Co., Northfield , 276 Old Wendell Rd. , 29.vi–2.vii.2016, em . 18.vii–2.viii.2016, C.S. Eiseman, ex Clematis virginiana , #CSE2778, CNC654120–654168 (23♂ 26♀); Northfield, 42.645962, -72.427679, 29.vi.2016, C.S. Eiseman, on Clematis virginiana , #CSE2646, CNC654108 (1♂).

Hosts. Ranunculaceae : Clematis ligusticifolia Nutt. ( Frick 1959) , C. * virginiana L.; adults caught on C. occidentalis (Hornem.) DC. ( Spencer 1969).

Leaf mine. ( Fig. 193 ) According to Spencer (1981), an “upper surface linear mine which gradually widens... and can appear as a blotch in small leaves”. The mines on Clematis virginiana begin with a small contorted portion that is initially on the lower leaf surface. They are whitish with frass in fine, closely spaced, black grains, sometimes forming beaded strips along the sides and sometimes more scattered. The larva exits through a slit on the lower leaf surface.

Puparium. ( Fig. 48 ) Brownish, deeply segmented; formed outside the mine ( Spencer 1981). In the field, the puparium was often found loosely attached to the lower leaf surface near the exit slit.

Distribution. USA: CA, DC, GA, ID, IN, LA, *MA, WA; Canada: QC.

Figures

FIGURES 44–50. Figures 44–45. Phytomyza hatfieldae spec. nov.; 44: puparia; 45: adult female. Figures 46–47: P. hydrophyllivora spec. nov.; 46: puparium; 47: adult male. Figure 48: P. loewii Hendel, puparium. Figures 49–50: P. palustris spec. nov. 49: adult male; 50: empty puparium.

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.