Monardis pulla D.R. Smith, 1969

Baine, Quinlyn & Looney, Chris, 2019, Plant associations for three sawfly species (Hymenoptera, Tenthredinidae) in the Pacific Northwest, Journal of Hymenoptera Research 74, pp. 27-33 : 27

Monardis pulla D.R. Smith, 1969

Notes.

A single female was reared from a Periclistus -modified gall of Diplolepis oregonensis ( Beutenmüller, 1918) ( Hymenoptera : Cynipidae ) on Rosa nutkana C. Presl. hand-collected in February, 2017. Galls were collected by visually searching R. nutkana stands, taken to the lab, and held at room temperature until insects emerged. Galls were checked several times a week and insects were pinned or transferred to vials of 70% EtOH as they emerged. This specimen emerged from a smooth, spherical gall, measuring about 15 mm in diameter and attached to the stem near the point of the spine node ( Fig. 1 ). The adult emerged from the gall, at the point farthest from the stem, on 1-2 March, 2017. The emergence hole measured 1.5 mm in diameter and led to a gallery about 5 mm in length. At the end of the gallery was the discarded pupal case of the sawfly. The gallery does not lead into the center of the gall, and there was no evidence of feeding activity in the gall, suggesting that the gall may only have served as an overwintering site. Two specimens of Periclistus ( Hymenoptera : Cynipidae ) also emerged from the gall.

Specimen data.

United States; 1♀; Oregon, Lane County, 10 km N of Corvallis; 44°38.66'N, 122°19.39'W; 12 Feb. 2017, em. 1-2 Mar. 2017; C. Looney & R. Chappel leg.; ex: Rosa nutkana .

Figures

Figure 1. Periclistus - modified gall of Diplolepis oregonensis (A), dissected to reveal the pupal chamber of Monardis pulla (B).