Phytomyza confusa Eiseman & Lonsdale

Material examined. IOWA: Winneshiek Co., Beard Farm, 23.v.2017, em.?, J. van der Linden, ex Hydrophyllum virginianum, # CSE4645, CNC1135657 (1♁).

Host. Hydrophyllaceae: Hydrophyllum virginianum L.

Leaf mine. Irregular in shape, sometimes with a distinct linear portion and sometimes seeming to form a primary blotch, even when very small. Mines are whitish with brownish patches and discrete, dark frass grains (Eiseman & Lonsdale 2018).

Puparium. Pale brown; apparently formed externally, but this requires confirmation (Eiseman & Lonsdale 2018).

Phenology and voltinism. Larvae have now been found in May and September (the latter overwintering as pupae), indicating Phytomyza confusa is at least bivoltine.

Distribution. USA: IA.

Comments. Although no details of the leaf mine characteristics or pupation site were recorded for this new rearing, it confirms the tentative identification of the host plant that was given in the original description.