Amiota lineiventris Máca, 2003

Figures 10A–B, 11D–E, 14, 82B

Amiota lineiventris Máca, 2003: 267 (original description); Brake and Bächli, 2008: 253 (world catalog).

DIAGNOSIS: Small to medium-sized fly (ThL 1.04–1.26 mm), dark brown; male sternites 7 and 8 with Y- and I-shaped apodemes, respectively; male genitalia distinctively simple: outer paraphyses a pair of small, ovoid lobes with narrow posterodorsal extension, several stiff, preapical setulae; inner paraphyses heavily sclerotized, simple, with distal and proximal ends a pair of short lobes, fused medially.

DESCRIPTION: Small to medium-sized fly (ThL 1.04–1.26 mm), dark brown, legs yellow. Frons dark, slightly pollinose in ventrolateral corners and surround ocellar triangle, with several scattered hairs. Facial marking narrow (FML/FMW 0.22–0.27). Cheek depth highly variable (EL/CW 12.50–25.50), yellowish gray. Palp yellow. Male sternites 7 and 8 distinctive, with sclerotized apodemes: Y-shaped in sternite 7 (area between arms concave), roughly I-shaped in sternite 8. Arista: Medium plumose; longest branch D1; A.R. 0.46; 3 long dorsal, 2–3 shorter ventral branches; branch D4 pointed laterad; arista trunk with short-medium microtrichia over entire length. Male genitalia: Epandrium very distinctive; split medially into distinct halves, widely separated; with row of setae ringing the circumference. Cercus large and semicircular, protruding greatly (not recessed into epandrium); occupying most of space surrounded by epandrium. Surstylus roughly square, with 9 prensisetae of equal size, apices blunt, comblike, ventral half and margin with scattered setulae. Subepandrial sclerite simple; subepandrial appendage small, ventral to epandrium (not protruding), lightly sclerotized and membranous, apex deeply notched. Outer paraphysis ovoid, with small lobelike extension on posterodorsal end; middle region laterally with ca. 9 short scattered sensilla; distally with 2–3 long setulae, 3× length of the sensilla. Inner paraphysis heavily sclerotized, with distal and proximal ends a pair of short lobes, apparently fused in middle. Aedeagal apodeme moderately sclerotized; bent nearly 45° at midpoint in lateral view, longer than wide; base and midpoint bulging, lightly sclerotized; distal end flared, deeply notched and concave, lateral arms most heavily sclerotized. Hypandrium simple, sclerotized, thickness consistent along length, apex bent inward. Ejaculatory apodeme 0.5× length of epandrium. Head and thorax measurements: (n = 5; Am 499, 592, 749, 1189, 1250) FL/FW 0.73 (0.68–0.76), EL/EW 1.21 (1.16–1.26), EL/CW 18.17 (12.50–25.50), FML/ FMW 0.25 (0.22–0.27), PR /RR 0.50 (0.36–0.62), ThL 1.16 (1.04–1.26 mm).

TYPE MATERIAL: Holotype: male: As reported by Máca (2003): “ ♂: Canada: Ontario: Eganville, damp meadow near lake, 2.6.1991, leg. M. Barták” [not examined]. Coll. J. Máca, to be deposited in National Museum of Prague, Czech Republic (NMPC). Paratypes: “Same data,” 1♂ (Coll. J. Máca, intended for NMPC). “ Canada, Quebec: Lac Roddic, 16 km S Maniwaki, 23.6.1991 1♂, leg. M. Barták.” (Coll. J. Máca, intended for NMPC).

OTHER MATERIAL EXAMINED: Canada: Ontario: Algonquin Provincial Park, Swan Lake Station, Scott Lake Survey, 1994-07-01 through 1994- 07-10, [collector unknown], C1 shore malaise trap, 1♂ (Am 592*, DEBU); Ottawa, 1970-06-26, leg. J. R. Vockeroth, 1♂ (Am 1444*, CNC); 1990-05-27, leg. J. R. Vockeroth, Ex damp shaded ditch in Acer wood, 1♂ (Am 1252*, CNC); 1992-07-26, leg. J. R. Vockeroth, Damp second-growth Acer-Betula wood, 1♂ (Am 1250*, CNC); 1995-06-24, leg. J. R. Vockeroth, Damp second-growth Acer-Betula wood, 1♂ (Am 1244*, CNC); Smith’s Bay, Nr. Picton, 1970-07-01, leg. J.F. McAlpine, 2♂ (Am 1183*, 1189*, CNC). Quebec: Old Chelsea, Summit King Mtn., 1965-06- 20, leg. D.M. Wood, 1♂ (Am 1201*, CNC). USA: North Carolina: Graham Co., Robbinsville, 1976- 06-09, leg. G.E. Bohart, 1♂ (Am 499*, EMUS). Virginia: Giles Co., Cascade Falls, 2001-05-19, leg. O. Lonsdale, debu01007820, 1♂ (Am 749*, DEBU).

DISTRIBUTION: The original description by Máca (2003) cited only specimens from Canada (Ontario and Quebec), but Amiota lineiventris is now known from one specimen each from North Carolina and Virginia, showing a much wider distribution.

COMMENTS: Amiota lineiventris is a rarely collected species, usually as an individual rather than a series. It is unknown whether this species is attracted to the eyes and face as in other Amiota.