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FIGURE 1. Psectrosciara makrochaites Amorim and Greenwalt sp. n., female, USNM 625934 and P. crassieton Amorim and Greenwalt sp. n., female, USNM 625035. A, P. makrochaites, habitus; B, Head and antennae; C, Wing, veins M1, M 2 and CuA; black arrows denote long abdominal hairs; D, Microsetae on wing surface; E, Legs. Short arrow denotes fore tibia not produced beyond base of tarsus, long arrow denotes apex of hind tibia not club-shaped, swollen at apex; F, Genitalia, spermatheca; G, P. crassieton, habitus. Scale bars equal 1.0 mm (A, G), 0.5 mm (B), 0.3 mm (C), and 0.2 mm (D - F).

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FIGURE 2. Dilophus idanos Fitzgerald and Greenwalt sp. n., USNM 624840, male. A, Habitus; B, Left wing; C, Wing drawing. Scale bars equal 1.0 mm (A) and 0.5 mm (B).

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FIGURE 3. Dilophus idanos Fitzgerald and Greenwalt sp. n., USNM 624840. A, Mesonotal spines; B, Spines of left fore tibia. C, Antennae (left arrow), palpus (right arrow) and spines (arrowheads) of right fore tibia. Scale bars equal 200 um.

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FIGURE 4. Dilophus idanos Fitzgerald and Greenwalt sp. n., paratype. USNM 768228, male. A, Habitus; B, Mesonotal spines; C, Spines of fore tibia. Scale bars equal 1.0 mm (A) and 0.2 mm (B, C).

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FIGURE 5. Dilophus magnus Dürrenfeldt, 1968, GZG.W 14836. A, Habitus (part); B, Wing (part), arrows denote r-m crossvein of two overlapping wings; C, Habitus (counterpart); D, Wing (counterpart); E, Apex of wing (counterpart), arrow denotes vein R4+5; F, Drawing of wing. Scale bars equal 1.0 mm (A, C), 0.5 mm (B, D), and 0.2 mm (F).

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FIGURE 6. Azana akarenos Kerr and Greenwalt sp. n. female, USNM 625099. Habitus; Insert: Terminalia. Scale bar equals 2.0 mm.

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FIGURE 7. Azana akarenos Kerr and Greenwalt sp. n. USNM 625099. A, Left wing, arrow denotes vestigial M4; B, Sc, right wing; C, Left wing macrotrichia; D, Row of spines on right mid tibia (small arrows), tibial spur (large arrow). Scale bars equal 0.5 mm (A), 0.1 mm (B, C), and 0.2 mm (D).

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FIGURE 8. Macrocera apithanos Kerr and Greenwalt sp. n., USNM 624407, male. A, Habitus; B, Genitalia. Black arrows denote setae; white arrow denotes a row of fore tibial spines. Scale bar equals 5.0 mm (A) and 0.5 mm (B).

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FIGURE 9. Macrocera apithanos Kerr and Greenwalt sp. n., USNM 624407. A, Left wing; B, Left wing, drawing; C, Body, setose. Scale bars equal 1.0 mm.

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FIGURE 10. Macrocera apithanos Kerr and Greenwalt sp. n. (allotype), USNM 729602, female. A, Habitus. B, Head, dorsal view. Arrows from top to bottom denote end of F1, spherical setose pedicel and cerebral sclerite. C, Hind tibial spurs. D, Genitalia. Scale bars equal 5.0 mm (A), 0.5 mm (B), 0.2 mm (C), and 0.5 mm (D).

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FIGURE 11. Macrocera apithanos Kerr and Greenwalt sp. n. A, Habitus of paratype female, USNM 768010. B-D, Area of wing basal of vein M1+2 of B) holotype, C) allotype female and D) paratype female. Scale bar equals 3.0 mm (A).

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FIGURE 12. Tmemophlebia carolinae Evenhuis and Greenwalt sp. n., USNM 768156, male. A, Habitus; B, Proboscis. Arrows from left to right denote labellum, labrum and palpus, respectively; C, Postpedicel. Arrow denotes bulbous dorsal prong of apical sulcus. Scale bars equal 2.0 mm (A) and 0.5 mm (B).

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FIGURE 13. Tmemophlebia carolinae Evenhuis and Greenwalt sp. n., USNM 768156. A, Right wing; B, Drawing of wing; C, Terminalia. TVII denotes 7th tergite of abdomen. Arrows from left to right denote epandrium (E--light area in middle of epandrium has lost the thin carbonaceous layer that constitutes the fossil), apical notch of epandrium (N), gonostylus (S) and gonocoxite and phallic complex (G). Scale bars equal 1.0 mm (A) and 0.2 mm (C).

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FIGURE 14. Brevitrichia messogenes Greenwalt and Winterton sp. n., USNM 620163, female. A, Habitus; B, Head and antennae; C, Genitalia. Scale bars equal 1.0 mm (A), and 0.2 mm (B, C).

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FIGURE 15. Brevitrichia messogenes Greenwalt and Winterton sp. n., USNM 620163. A, Left wing; B, wing, drawing. Scale bar = 1.0 mm.

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FIGURE 16. Palaeoapsilocephala kishenehnensis Hauser and Greenwalt gen. and sp. n., USNM 717195, Male. A, Habitus; B, Antennae; C, Drawing of antennae; D, Right wing; E, Drawing of right wing. Scale bars equal 2.0 mm (A), 0.15 mm (B), and 1.0 mm (D).

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FIGURE 17. Palaeoapsilocephala kishenehnensis Hauser and Greenwalt sp. n., USNM 717195. A, Hind tibia spurs; B, Genitalia. C, Drawing of genitalia. Scale bars equal 0.5 mm (A, B).

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FIGURE 18. Microphorella fragilis Cumming and Greenwalt sp. n., USNM 624117, male. A, Habitus; B, Right wing; C, Wing drawing. Scale bars equal 1.0 mm (A) and 0.5 mm (B).

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FIGURE 19. Microphorella fragilis Cumming and Greenwalt sp. n., USNM 624117, male. A, Head; arrow points to palpus; B, Scutum; C, Male terminalia; arrow denotes cercus. Scale bars equal 0.2 mm (A, C) and 0.5 mm (B).

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FIGURE 20. Hoplocyrtoma eocenica Sinclair and Greenwalt sp. n., USNM 621518, female. A, Habitus; B, Left wing; C, Left wing, drawing. Scale bars equal 2.0 mm (A) and 1.0 mm (B).

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FIGURE 21. Hoplocyrtoma eocenica Sinclair and Greenwalt sp. n., USNM 621518. A, Antennae and mouthparts; B, Left hind leg; C, Genitalia. Scale bars equal 0.2 mm (A, C) and 0.5 mm (B).

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FIGURE 22. Opetia americana Amorim and Greenwalt sp. n., female, USNM 621520. A, Habitus; B, Head and anterior end of scutum. Abbreviations: ar1-2, aristomeres 1 and 2; flg1, flagellomere 1; orb, orbital setae; presut sa, presutural supra-alars. Scale bars equal 1.0 (A) and 0.1 mm (B).

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FIGURE 23. Opetia americana Amorim and Greenwalt sp. n., female, USNM 621520. A, Head, anterior end of scutum, and distal end of anterior leg. Abbreviations: pe, antennal pedicel; sc, antennal scape; flg1, flagellomere 1; tcl, tarsal claw; ti1, front tibia; tm1-5, tarsomeres 1 to 5; B, Right wing. Scale bars equal 0.2 mm (A) and 0.5 mm (B).

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FIGURE 24. Opetia americana Amorim and Greenwalt sp. n., female, USNM 621520. A, Left wing base; B, Tip of abdomen and terminalia. Abbreviations: ovi, ovipositor; scl, ovipositor sclerotized lines; T3-6, tergite. Scale bars equal 0.2 mm.

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FIGURE 25. Comparison of wing venation of three opetiids. A, Puyehuemyia chandleri Amorim, Silva and Brown; B, Opetia americana Amorim and Greenwalt sp. n. Comparison of landmarks on wing of O. americana, sp. n.: 1. anterior end of Hu at C; 2. tip of Sc at C; 3. tip of R 1 at C; 4. tip of R2+3 at C; 5. origin of Radial Sector at bR; 6. anterior end of r-m; 7. fork of M1 and M2; 8. distal end of M 1; 9. tip of CuA+CuP. C. Opetia nigra Meigen (modified from Chandler, 2001).

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