Agelanius burgeri González, 2006

González, Christian R., 2006, Agelanius burgeri, a new species of horse fly from south Chile (Diptera: Tabanidae), Zootaxa 1364, pp. 59-64 : 60-63

Agelanius burgeri González sp. n.

( Figs. 1–13 )

Description of female. Length 8.5 mm; wing 9.5 mm. Head: eyes black, without bands, with short brownish hairs ( Fig. 1 ). Frons pale brown, with grayish tomentum, darker on the ocellar triangle, bearing short, sparse black hairs. Frons narrow, slightly divergent, index 3.0. Frontal callus dark brown, with keel-shaped median projection extending more than half the height of the frons, not touching eyes and subcallus ( Fig. 2 ). Ocellar triangle brown with grayish tomentum, with three ocelli. Posterior border of the head gray; vertex with sparse short semi-erect black hairs. Subcallus grayish tomentose, with sparse hairs laterally. Clypeus and genae whitish-gray tomentose, genae with long whitish hairs and sparse black hairs, clypeus bearing whitish short hairs laterally. Beard with long whitish gray hairs. Scape of antenna brown, with grayish tomentum and with short and erect black hairs dorsally and laterally, ventrally longer. Pedicel concolorous, with short, erect black hairs, longer laterally. Basal flagellomere brown with low dorsal median angle, apical flagellomeres concolorous ( Fig. 3 ). Maxillary palpi slender and elongate, with yellowishgray tomentum and short black hairs ( Fig. 4 ). Proboscis dark brown, labella brown, large and fleshy ( Fig. 1 ). Thorax: mesoscutum dark brown, without longitudinal stripes. Notopleural lobe brownish gray, with long gray hairs. Scutellum dark brown, without pruinosity, with long grayish hairs only on the dorsal surface and lateral border. Pleura pale brown with grayish tomentum, with long yellowish-gray hairs; anepisternum with few black hairs. Legs dark brown, coxae and femora concolorous, with long yellowishgray and black hairs, tibiae and tarsi with short black hairs. Wings slightly smoky; veins pale brown, Sc and R1 setose, without spur on R4. Basicosta bare. Halteres dark brown. Calypters concolorous with base of wing. Abdomen: brown dorsally, with short yellowishgray hairs, posterior border of tergites lighter, lateral border of tergites with long grayish and some black hairs. Sternites darker with abundant short black hairs ( Fig. 5 ).

Genitalia: cerci subovoidal, with long hairs ( Fig. 6 ). Tergite X subrectangular, sclerotized ( Fig. 6 ). Tergite IX subtriangular, with semi-erect hairs ( Fig. 6 ). Gonapophysis projected distally with long bristles ( Fig. 7 ). VIII sternite with convex base ( Fig. 7 ). Genital fork with straight base, with long and slender spermathecal ducts ( Fig. 8 ).

Description of male. Length 9.0 mm; wing 9.5 mm. Similar to female except as follows: eyes with pilosity longer and denser ( Fig. 9 ), ocelli vestigial, genae without black hairs. Subcallus bare. Scape and pedicel lighter, with longer pilosity ( Fig. 10 ), maxillary palpi grayish, short and stout with abundant long black hairs ( Fig. 11 ). Pleura dark gray, with more abundant long yellowish-white hairs. Genitalia: cerci subquadrangular, with sparse black hairs ( Fig. 12 ). Tergite X strongly sclerotized, with black hairs ( Fig. 12 ). Apex of basistyle with a few bristles; gonostyle with apex truncate ( Fig. 13 )

Material. Holotype female, Chile, Cautín Province, Nueva Imperial 6 January 1942, D.S. Bullock Paratype: 1 male with same data. Holotype and Paratype in Instituto de Entomología collection, Univ. Metropolitana de Ciencias de la Educación, Santiago, Chile.

Etymology. patronym for Dr John F. Burger, University of New Hampshire, friend and world specialist in the family Tabanidae .

Figures

FIGURES 1 – 8. Agelanius burgeri sp. n. female. 1: head in side view (scale bar = 1.0 mm); 2: frons (scale bar = 1.0 mm); 3: antenna (scale bar = 0.5 mm); 4: maxillary palp (scale bar = 0.5 mm); 5: abdomen in dorsal view (scale bar = 1.0 mm); 6: tergite IX, X, cerci, and hypoproct (scale bar = 0.3 mm); 7: gonapophysis and VIII sternite (scale bar = 0.2 mm); 8: genital fork and spermathecal ducts (scale bar = 0.3 mm).

FIGURES 9 – 13. Agelanius burgeri sp. n. male. 9: head in side view (scale bar = 1.0 mm); 10: antennae (scale bar = 0.5 mm); 11: maxillary palp (scale bar = 0.5 mm); 12: cerci, paraprocts and hypoproct; 13: gonostyli.