Calyxochaetus leptofortunatus Runyon, 2024, n. sp.

Calyxochaetus leptofortunatus n. sp. (Figs 81, 84, 93, 94) Type material. HOLOTYPE ♂, labeled: “ Keene Valley / Essex Co. N.Y. / 1200ꞌ 20.VII.62 / J.R. Vockeroth ”; “HOLOTYPE/ Calyxochaetus / leptofortunatus /J.B. Runyon[red label]”(CNC)(Fig.93). PARATYPES: CANADA: Nova Scotia: Cape Breton Highlands National Park, Pleasant Bay, PG684871, 10.vii.1984, wet hardwood forest, H.J. Teskey (1♂, CNC). Quebec: Abbotsford, 2.vii.1936, G.E. Shewell (1♂, CNC); Knowlton Lodge, 20.vii.1968, J.R. Vockeroth (1♂, CNC). USA: Maine: Waldo County: Belfast, 2.viii.1972, FCH (1♂, FSCA). New Hampshire: Cheshire County: Mount Monadnock, 26.vii.1926, ALM (1♂, USNM). New York: Same data as holotype (8♂, 4♀, CNC); Delaware County: Hancock, 3.viii.1935, H.K. Townes (1♂, AMNH); Greene County: Lanesville, 3.viii.1974, FCH (1♂, MTEC); Monroe County: Rochester, 29.vii.1972, FCH (2♂, FSCA); Yates County: Penn Yan, 30.vii.1972, FCH (1♂, FSCA). North Carolina: Macon County: Wayah Gap, 4100 ft, 28–29.vii.1957, W.R. Richards (5♂, CNC); same data except, base of Wayah Bald, 11.viii.1957 (1♂, CNC); same data except, Wayah Bald, 29.vii.1957 (1♂, CNC). Pennsylvania: Luzerne County: Choke Creek, 3.4 mi. SW Thornhurst, 22.vii.1991, RLH (1♂, MTEC). Vermont: Washington County: 12 km SW Waterbury, Camel’s Hump trail, 26.viii.2001, S.E. Brooks & C.P. Chenard (1♂, CNC). Virginia: Augusta County: Reddish Knob, 29.viii.1953, W.W. Wirth (1♂, USNM); Madison County: Shenandoah National Park, Big Meadows, 1.vii.1939, ALM (1♂, USNM); same data except, 3.vii.1930 (1♂, USNM). Diagnosis. This species is very similar to C. fortunatus but differs in having a narrower arista-like stylus (Fig. 81) and narrower fore tibia (Fig. 84). Description. Male. Wing length 2.9–3.3 mm. Similar to C. fortunatus except as noted: Head: Arista-like stylus (Fig. 81) with smaller narrower apical lamella, with only about apical half of article 2 thickened. Legs: Foreleg (Fig. 84): Tibia not as strongly swollen, subequal to or slightly less than width of fore femur. Tarsomere 3 with apex slightly less broadened, with shorter dorsal microsetulae. Female. Wing length 3.1–3.3 mm. Distribution and seasonal occurrence. This species appears restricted to the Appalachian Mountains from Nova Scotia south to North Carolina (Fig. 94), occurring at higher elevations in the southern Appalachians. Adults have been collected in July and August. Etymology. The specific epithet is from the Greek leptos (thin, slender) + fortunatus, in reference to this species being similar to C. fortunatus but having a thinner arista-like stylus and fore tibia.