Dasyhelea curacaoensis n. sp. (Figs. 31–41, 64–66) Diagnosis . The only Neotropical species of the mutabilis group with the following combination of characters. Males with a very short antennal flagellum (length 0.40–0.47 mm); antennal ratio 0.91–1.21; gonostyus moderately short with slender rounded apex; right gonocoxal apodeme broadly fused with paramere, left apodeme not fused with paramere; apical section of paramere J-shaped, tapering distally, tip sharply pointed; aedeagus with deep basal arch, posterolateral arms with pointed apices, without mesal subapical toothlike process. Females with very short antennal flagellum (length 0.31–0.33 mm), flagellomeres 2–12 moniliform, 13 slightly elongate with abruptly tapered apex, antennal ratio very small (0.65–0.71); wing broad with very short costa, costal ratio 0.23–0.25; subgenital plate very broad, ovoid with small narrow lumen, posteromedian margin rounded, posterolateral arms stout, nearly straight; spermatheca small (35 x 28 µm), ovoid, with numerous surface punctuations, with a stout, recurved neck. Male . Head (Fig. 31). Brown. Eyes contiguous for a distance equal to the width of 3–4 ommatidia. Antennal flagellum very short; flagellomeres 2–9 rhomboid, 10–13 elongate, 10 longest, 13 broadest; flagellomeres 2–12 with single whorl of long sensillae chaetica comprising the dense plume that extends to near apex of flagellomere 12; antennal ratio 0.91–1.21 (0.98, n=12); flagellum length 0.40–0.47 (n=12) mm. Frontal sclerite rhomboidal with a slender posterior extension. Clypeus with 4 pairs of setae. Palpus (Fig. 32) pale brown; segment 3 slender, as long as 4+5 combined with scattered capitate sensillae on inner surface; palpal ratio 2.85–4.20 (3.56, n= 13). Thorax. Dark brown; scutellum with 6 large, 2–3 smaller setae. Wing (Fig. 33) moderately slender; membrane hyaline with moderately dense macrotrichiae; veins brown; 2 nd radial cell reduced to a suture, with gap between apices of costa, radius; fork of CuA 1 at level of apex of 2 nd radial cell; without a ...