(Fig. 222)
Material examined. OREGON: Clackamas Co., Mt. Hood / Mirror Lake, 14.x.2012, em. 28.iv–5.v.2013, C.S. Eiseman, ex Trautvetteria caroliniensis, #CSE375, CNC422924–422935 (12♀).
Host. Ranunculaceae: Trautvetteria caroliniensis (Walter) Vail.
Leaf mine. (Fig. 222) Multiple larvae feed together, making contorted mines that initially have squiggly, stringy frass; later frass is deposited in discrete grains.
Puparium. Brownish; formed within the mine.
Comments. Larvae were still active in mid-October at the time of collection. Unfortunately all 12 adults reared from these mines were females. These have a yellow frons, face, knees, and shoulders, as well as equal-sized ors, similar to Phytomyza plumiseta Frost, but are not readily identified to this or other known species with these features. Trautvetteria is not a known host for any agromyzid.
Phytomyza sp. 7
(Fig. 223)
Material examined. OREGON: Clackamas Co., Mt. Hood / Mirror Lake, 14.x.2012, em. by 30.iv.2013, C.S. Eiseman, ex Tiarella trifoliata var unifoliata, #CSE378, CNC 384814 (1♀).
Host. Saxifragaceae: Tiarella trifoliata L. var. unifoliata (Hook.) Kurtz.
Leaf mine. (Fig. 223) Long, linear, whitish, on the upper leaf surface; frass in discrete black grains, widely spaced except near the beginning.
Puparium. Whitish with a dark, central, longitudinal stripe; formed within the leaf, in a small chamber on the lower surface, with the anterior spiracles projecting through the lower epidermis.
Comments. The mine may not be distinguishable from that of Phytomyza tiarellae, which is also known from Tiarella trifoliata, although some of the mines at the collection site were substantially wider at the end than 2 mm, the approximate terminal width given for that species by Griffiths (1972a). Also see comments for P. tigris.