(Figs. 7A–F, 9M, 10L, 11Z, 12Z, 13Z)
Description. Length of male 4.15–4.28 mm. General appearance light brown with numerous widely distributed dark spots. Crown 1.6 x longer than basal width between eyes, pale white with several longitudinal brown spots forming almost continuous band between eyes and another toward apex (Fig. 7A). Face pale yellow with small light brown spots at apex of frontoclypeus and along lateral margins of gena (Fig. 7C). Forewings brown, with numerous widely distributed dark spots; with numerous (14–16 approximately) widely distributed round white spots (Fig. 7B), with 11 brown veins; third apical cell with pale outer edge. Legs light brown with black spots on tibiae and femora.
Male genitalia. Pygofer in lateral view triangular with rounded apex, multiple macrosetae at apex (Fig. 9M). Subgenital plate triangular, wider at base than at apex, much longer than wide, with row of approximately 5–6 macrosetae on external margin, with multiple extended punctures (Fig. 10L). Connective in ventral view U-shaped. Style apophysis in ventral view thin and rounded at apex; space between preapical lobe and apophysis L-shaped (Fig. 7D). Paraphyses in ventral view long and thin, fused at base and diverging rapidly, crossing at midlength, then converging again toward apex; apex of paraphyses with slight V-shaped bifurcation (Fig. 7D). Aedeagus in lateral view with dorsal apodeme and shaft forming V-shape (Fig. 7E 1); preatrium absent; dorsal apodeme of similar length to shaft; shaft thin and tubular, with two small spines at apex projecting dorsolaterally; in apical view, tubular with two very small dorsolateral spines (Figs. 7F). Gonopore in apical position (Fig. 7F).
Diagnosis. Apex of paraphyses with slight bifurcation (Fig. 7D). Aedeagus in lateral view with dorsal apodeme and shaft forming a V-shape (Fig. 7E 1), with two very small spines dorsolaterally (Fig. 7E 2).
Distribution. Costa Rica.
Biology. Unknown.
Etymology. Referring to viper snakes, due to the appearance of the paraphyses apex resembling the mouth of viper.
Material examined. Holotype. ♂. Costa Rica, Guanacaste, 3 km sureste Río Naranjo, Rancho Montezuma. 20.XI.1994. col: R.G. Allen, INBIO CRI001 951065 (MNCR). Paratype. 1 ♂. Costa Rica, Guanacaste, 15 km SW Cañas, Estacion Experimental E. Jimenez Nuñez. 13.VIII.93. col: R.G. Allen, INBIO CRI002 085615 (MNCR). 1 ♂. Costa Rica, Guanacaste, Cerro el Hacha 12 km SE La Cruz. 800 m. 1988. INBIO CRI000 050279 (MNCR)