Agathidium parile Fall 1934

Agathidium parile Fall, 1934. Material Examined. Lectotype (designated here to clarify assignment of this name to this species), # in MCZC labeled ‘‘Sugar Pine, Cal. R. A.Fenyes / Type parile [‘‘parile’’handwritten, red line under ‘‘Type’’]/ M.C.Z. Type 24041 [red label]/ H.C. FALL COLLECTION.’’ There is a single paralectotype with the same label data as the lectotype. Additional specimens were examined from the following localities: Canada: British Columbia: Mt Robson P. Pk, Berg Lake Trailhead, 11 Jul 1984, R. S. Anderson, (2, CNCI); Manitoba: Devils Lake, 100 km S Grand Rapids, 7 Jun 1984, S. and J. Peck, (2, PECK); Ontario: 25 km W Ignace, 75 km E Dryden, 5 Jun 1984, S. and J. Peck, (1, PECK); 25 km W Ignace 75 km E Dryden, 5 Jun 1984, S. and J. Peck, (3, PECK); Stittsville, 5 Jul 1976, M. Sanborne, (1, CUIC). United States: California: Sugar Pines, (12, CASC); 10 mi N Yosemite, 2 Jul 1946, 6,000 ft, H.P. Chandler, (2, EMEC); New Hampshire: Coos Co., 1 mi NE East Inlet Dam, 25 Jun 1986, D.S. Chandler, (2, MCZC); Coos Co., Norton Pool, 3 mi NW East Inlet Dam, 25 Jul 1986, D.S. Chandler, (4, MCZC); Coos Co., Norton Pool, 2 mi E East Inlet Dam, 7 Sep 1984, D.S. Chandler, (5, MCZC); Coos Co., 1 mi E East Inlet Dam, 24 Jun 1986, D.S. Chandler, (5, MCZC); Strafford Co., 1 mi SW Durham, College Woods, 2 May 1985, D.S. Chandler, (2, MCZC); Strafford Co., 1 mi SW Durham, 11 Jun 1987, D.S. Chandler, (2, MCZC); Strafford Spruce Hole, 3 mi SW Durham, 10 Jul 1987, D.S. Chandler, (1, MCZC); New York: Cattaraugus Co., Allegheny St. Pk., 12 Jun 1968, S. Peck, (2, CUIC); North Carolina: Black Mtns, (1, CASC); Avery, Linville Falls, 2 Jun 1981, S. Peck, (3, CUIC); Buncombe, Great Craggy Mts., 2 Jun 1981, S. Peck, (1, CUIC); Haywood, Balsam Mt., 3 Jun 1981, S. Peck, (7, CUIC); Transylvania, Mt Pisgah, 3 Jun 1981, S. Peck, (3, CUIC); Wilkes, Jeffress Park, Blue Ridge Pk., 1 Jun 1981, S. Peck, (2, CUIC); Yancy Co., Black Mts. Blue Ridge Pk., 15 Aug 1981, S. Peck, (1, CUIC). Pennsylvania: Crawford Co., Wallace Woods Linesville, 11 Jul 1966, W. Suter, (1, CUIC); Hunt Co., Rothrock St. For. Seeger Nat. Area, 9 Jul 1984, 900 ft, D.S. Chandler, (3, MCZC); McKean Co., Allegheny N. For. Tionesta Scenic A., 29 May 1985, D.S. Chandler, (1, MCZC); Warren Co., Allegheny N. For., Hearts Content Scenic Area, 29 May 1985, D.S. Chandler, (1, MCZC); Westmoreland Co., 3 mi E Berlin, 10 Jul 1984, D.S. Chandler, (3, MCZC). Vermont: Addis Co., Bryant Mt. Summit 2 mi N Lake Dunmore, 25 Jun 1985, D.S. Chandler, (1, MCZC). Virginia: Giles Co., 20 Jun 1986, 3,700 ft, S.L. Stephenson, (3, AMNH); Giles Co., 6 Oct 1984, S.L. Stephenson, (1, AMNH). Type Locality. United States, California, Sugar Pine. Diagnosis. This species is very similar externally to G. parvulum, and each have the head not strongly constricted posterad of the eyes (Figs. 26–27), the labrum broad and transversely subrectangular (Figs. 26–27), the metasternum relatively narrow medially (MTL/MTW, 0.30) and the median lobe very broad and robust with the operculum long and slender apically (Figs. 7, 10). This species differs from G. parvulum in having the lateral margin of the median lobe not so strongly emarginate and the apex sharply pointed in ventral aspect (Fig. 7), and with the apex sharply pointed and distinctly curved dorsad in lateral aspect (Figs. 8, 9). The apical portion is denticulate along the lateral margin visible in both ventral and lateral aspects (Figs. 7, 8). Gelae parvulum also lacks a distinctive tooth on the posterior margin of the male metafemur. Description. Body moderately large (TBL ¼ 2.28–2.47 mm), robust (PNW/TBL ¼ 0.46), laterally broadly rounded, weakly contractile. Head, pronotum, elytra and venter brown; antennae, palpi and legs yellow-brown. Head moderately broad (MDL/PHW ¼ 0.55–0.67), dorsally flattened; constricted immediately posterad of eye; very finely and sparsely punctate, surfaces shiny and smooth between punctures; eyes large, rounded, protruding; fronto-clypeal suture continuous, but fine, medially; clypeal margin moderately protruding, extending beyond level of anterolateral margins of frons (Fig. 26); labrum broad, transversely rectangular; antennae (ratios: length I:II:III ¼ 1.3:1.0:1.0, width VII:VIII:IX ¼ 1.0:1.0:1.4). Pronotum broad (PNL/PNW ¼ 0.63–0.64), laterally not strongly produced, lateral margins nearly straight, anterolateral angle subquadrate, posterolateral corner distinctive, more angulate than anterolateral corner; punctation similar to that of head. Elytra robust (SEL/ELW ¼ 1.06–1.12); lateral margins broadly rounded; punctation very fine and sparse, similar to pronotum; sutural stria prominent, extending about 1/2 length of elytron. Mesosternum strongly concave posteriorly, with prominent lobe extending ventrally between mesocoxae, anterior portion moderately narrow. Metasternum broad medially (MTL/MTW ¼ 0.21–0.23). Male tarsi 5–5–4; pro- and mesobasotarsomeres only slightly expanded and with small ventral field of adhesive setae; metafemur slender, slightly expanded medially, but without tooth; metasternal fovea small, located slightly anterad of middle, with small pencil of fine, dense setae. Median lobe in lateral aspect robust, broad, moderately curved medially, apical portion narrowed, apically slender, strongly curved dorsad, apex pointed, dorsal margin with prominent dentitions and submedial emargination (Fig. 9); in ventral aspect very broad, lateral margins subparallel, apical portion broad basally, broadly acuminate, apex pointed, lateral margins of apical portion distinctly denticulate, with small but prominent emargination near base of apical portion, orifice very large, elongate (Fig. 7); operculum long, broad basally, abruptly constricted medially, apical half long, slender, straight (Fig. 7); lateral lobes long, curved, moderately broad, apically expanded, with 1 long and 1 short spinous setae (Figs. 7–8). Female tarsi 5–4–4. Distribution. This species is known from California and British Columbia east through Canada to New Hampshire and Vermont and south in the east along the Appalachians to North Carolina. Discussion. This species has been collected from various forest types including hemlock, pine, aspen, fir, maple, etc., and from various litter sources including rotting stumps, leaf litter, etc. Host data from label information include the slime molds Cribraria sp. and Dictydium cancellatum (Batch) MacBride.

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