11. Thecomyia signorelli Marinoni and Steyskal, new species (Figs. 16, 28, 41, 42)

Description. Adult. Upper orbital seta well developed. Fronto­orbital spot subtriangular, width approximately 1/4 of frontal width. Rostrum 0.57­0.64 in males as high as eye. White microtomentose infra­ocular marking forming irregular triangle, apex reaching to about 1/2 of gena; margin between gena and post­gena slightly curved. Mid femur without anteromedial seta. Mid and hind femora wholly yellowish. Mesonotum with medial stripe tripartite or evanescent anteriorly, yellow only for short distance before scutellum, otherwise gray. Ejaculatory apodeme wide apically, posterior margin concave; anterior margin almost straight (Fig. 16). Phallapodeme short, almost straight. Anterior basiphallic process pointed forward. Epiphallus not extending to base of distiphallus. Distiphallus with one digitiform extension, apex membranous. Hypandrium in lateral view with dorsal margin convex, anteroventral margin narrow, rounded (Fig. 28). Anteroventral hypandrial plates in dorsal view with margins rounded. Membranous projections at margins of anteroventral hypandrial plates not extending to lateral margins of hypandrium; covered with minute hairs (Fig. 28). Posterior and anterior surstyli distinct; posterior clawlike, pointed (Fig. 16).

Type specimens. HOLOTYPE MALE. 1. Brown rectangular label: [BRAZIL] "Est. S. Paulo, Avanhandava, Barra Mansa, Barreto Col. 2­946"; 2. White rectangular label with black borders: " Thecomyia # 9, handwritten in black ink, d. G. Steyskal'69" (MZSP). PARATYPE MALE. 1. White rectangular label: [BRAZIL] "Córrego Azul, Araçatuba, SP, III.1947, M.P. Barreto", handwritten in black, 1 male (MZSP). PARATYPES. 1. Small rectangular white label: [ECUADOR] "Coca, Napo R., Napo, ECUADOR, V. 1965, 250 m., L. Peña, 2 m. (CNC).

Etymology. The species epithet, signorelli, is an apost name to recognize the contributions of the Signorelli family to L. Marinoni's studies, and the many gracious acts of Julieta and Lucrécia Signorelli.