Amiota latilabrum, sp. nov.

Figures 51C–D, 53B, 55, 60A, 91B

DIAGNOSIS: Large fly (ThL 1.75–1.84 mm), dark brown and glossy; outer paraphysis heavily sclerotized, apex with hook, in lateral view with 2 long spines on posterodorsal margin, proximal spine longer, usually curving inward medially, nearly touching opposing appendage; base forming a tapered wing, curving medially in ventral; very similar to Amiota subnebojsa, but differs as follows: cercus smaller; surstylus less crescentic, apical lobe slightly longer (vs. shorter) than prensisetae; aedeagal apodeme shorter relative to its width; subepandrial sclerite appendage shape less cordate; basal paraphysis spine without small apical notch; ejaculatory apodeme slightly longer (vs. shorter) than depth of epandrium.

DESCRIPTION: Large fly (ThL 1.75–1.84 mm), dark brown, uniformly so, glossy; legs yellow. Facial marking large, semicircular. Cheek wide (EL/CW 8.50–11.57), milky white posteriorly. Palp dark brown. Tergites 1 and 2 lightly colored. Arista: Short, plumose; longest branch D3; A.R. 0.28; graded series 7–8 dorsal branches shortening distad, 1 short ventral branch; none pointed mediad/laterad; arista trunk with medium-length microtrichia along entire length. Male genitalia: Epandrium nearly split medially, not grading with surrounding membrane; dense cluster of setae ventrally, ascending in a single line toward apex; small lobe projecting on anterolateral margin. Cercus oval shaped, distinct from surrounding membrane; barely protruding beyond distal margin of epandrium in lateral view. Surstylus roughly triangular, ventral half with scattered setulae; 13 peglike prensisetae, apices blunt, comblike; distallateral fingerlike lobe present, length equal to that of prensisetae. Subepandrial sclerite large, broad, trapezoidal, lateral margins thickened; C-shaped in lateral view; subepandrial appendage well developed, apex with thin, mucronate point (in lateral view), subcordate in posterior view. Outer paraphysis heavily sclerotized, formed of 2 lobes, split deeply medially, apex laterally flattened; distal end with sharply curved hook in lateral view, ventrally with preapical lobe; dorsal margin with 2 long spines, distal spine shorter, basal spine curving medially in some specimens; lobes at base in ventral view. Inner paraphysis lost. Aedeagal apodeme nearly wide as long, curved in lateral view; distal end widely flared with a broad emargination. Hypandrium U-shaped, thickness consistent; apex notched, accommodating outer paraphyses; lateral arm with gonopod, oriented posteroventrally. Ejaculatory apodeme very large, equal to or slightly longer than length/depth of epandrium. Head and thorax measurements: (n = 5; Am 2, 3, 5, 1426, 1525) FL/FW 0.72 (0.66–0.77), EL/EW 1.32 (1.22–1.42), EL/CW 10.09 (8.50– 11.57), FML/FMW 0.41 (0.34–0.54), PR /RR 0.57 (0.54–0.70), ThL 1.79 (1.75–1.84 mm).

TYPE MATERIAL: Holotype: male: “ 9 mi. SE.” Huachinango, Puebla MEX., [20.062775, -97.962064], M Wasserman, WB Heed, “ June 1952,” 2260:13, Am 2, [glued to paper point, dissected]. Deposited in the American Museum of Natural History (AMNH). Paratypes: “ 9 mi. SE.” Huachinango, Puebla MEX., M Wasserman, WB Heed, “ June 1952,” 2260:13, 2♂ (Am 3*, 5*, AMNH).

OTHER MATERIAL EXAMINED: Mexico: Chiapas: 5 mi. W San Cristobal, 7500′, 1969-05-06, leg. H.J. Teskey, 1♂ (Am 1426*, CNC); 20 mi N. Bochil, Yerba Buena, 6500′, 1969-06-09 through 1969-06-10, leg. W. R. M. Mason, 1♂ (Am 1264*, CNC). Durango: 14 mi. SW El Salto, 8000′, 1964-06-26, leg. J.F. McAlpine, attracted to man, 1♂ (Am 1525*, CNC). Sinaloa: El Palmito, 6400′, 1964-07-02, leg. J.F. McAlpine, 1♂ (Am 1518*, CNC).

ETYMOLOGY: From Latin latus for “wide” and labrum for “lip.” Used as a noun in apposition. In reference to the characteristic wide facial marking of this species.

DISTRIBUTION: Amiota latilabrum occurs widely throughout Mexico including the states of Chiapas, Durango, Sinaloa, and Puebla.

COMMENTS: This species exhibits the characteristic behavior of attraction to the eyes and face common to many Amiota.