Retrorsia gracilis Shear & Marek, n. sp.

Figs 47–49, 124, 125

Types. Male holotype and male and female paratypes from Lewis Co., Washington, 604 Roswell Road, Centralia, 46.7223°, -122.9444°, collected 25 January 2004 by W. Leonard and C. Richart. All types deposited in CAS .

Diagnosis. The pulvillus (p, Fig. 49) is displaced to the distal one-fifth of the gonopod, with the pulvillar notch (rn, Fig. 49) immediately distal. The retrorse process (rp, Fig. 49) is sharply recurved. There are 18 setae in the anterior marginal row of the collum.

Etymology. The species name, an adjective, refers to the slender gonopods.

Description. Male holotype. Length 4.5 mm, greatest width 0.5 mm. Anterior metazonites with three rows of setae, distribution irregular on seventh ring, transitioning to four rows (Fig. 50) on eighth and ninth ring; a few posterior segments may appear to have five rows due to intercalated setae. Epiproct not swollen, short. Anterior legs crassate, tarsi with sphaerotrichomes. Gonopod (Figs 47–49, 124, 125) with large, inflated prefemorite. Acropodite long, slender, pulvillus (p, Fig. 49) in distal fifth of acropodite, pulvillar notch immediately distal. Retrorse process of terminal zone strongly decurved (rp, Fig. 49, relatively long. Subterminal process (st, Fig. 49) with small tooth subdistally. Females similar to males in nonsexual characters.

Distribution. Lewis Co., Washington.

Records: WASHINGTON: Lewis Co.: Iron Creek Campground, 9.6 mi south of Rendell on FS25, Gifford Pinchot National Forest, 45.4297°, -121.9869°, 21 December 2003, W. Leonard, m ff; North Fork Newaukam River, below confluence with Middle Fork, 46.6046°, -122.8482°, 29 December 2004, W. Leonard, m ff.