Chrysanthrax yaqui (Painter) Painter, 2009

Ávalos-Hernández, Omar, 2009, A review of the North American species of Hemipenthes Loew, 1869 (Diptera: Bombyliidae), Zootaxa 2074, pp. 1-49 : 46-47

Chrysanthrax yaqui (Painter) , new combination

(Fig. 26)

Villa yaqui Painter in Painter and Painter, 1962: 94. Hemipenthes yaqui (Painter) : Hull, 1973: 386.

Holotype in USNM.

Diagnosis: Face bluntly projecting, scape as long as pedicel; flagellomere with basal half wide, apical half slender, not styliform; third abdominal tergite with a stripe of white scales.

Description: Male. Body length: 7–12 mm; wing length: 8–13 mm Head: Eyes separated by one and a half width of ocellar triangle. Front black pilose, yellowish tomentose. Face brown, bluntly projecting, with black hairs and yellowish tomentum. Scape fulvous, swollen on inner apical margin, with black hairs, as long as pedicel; pedicel brown, twice as wide as long, with long black hairs in dorsal portion, bare in ventral portion; flagellomere brown, longer than scape and pedicel combined; basal half wide, apical half slender, not styliform; stylus minute, terminal. Proboscis short, slightly projecting beyond oral margin. Palpi black with black hairs. Occiput with short whitish hairs and yellowish scales.

Thorax: Mesonotum anterior and lateral margin pale yellow pilose; tomentum on disc entirely yellowish, long, hairlike, dense; bristles black. Mesopleuron pale yellow pilose on proepisternum and anepisternum, katatergite with white hairs, tomentum on katepisternum white-violet. Proepimeron with yellowish hairs in dorsal portion and black hairs in ventral portion. Mid coxa with black hairs, tomentum on all coxae hairlike, black. Legs black, femora black pilose and tomentose; bristles black. Halter steam yellow, knob white. Scutellum black, not pilose, and yellowish tomentose; bristles black. Black setulae on basicosta. Color on wing faint, forming a triangle with base on anterior margin of wing (Fig. 26); cells c, sc, br, bm, and a entirely infuscated; cell cup entirely infuscated except tip; cells cua1 and dm with basal half infuscated; cell r1 with basal third infuscated; cells r2+3, m2 and r5 infuscated just at base; cell dm infuscated beyond r-m crossvein; rm crossvein behind middle of cell dm; no crossvein between R4 and R2+3; cell r5 slightly narrowed at wing margin; first section of vein CuA1 two and a half the long of r-m crossvein, second section half the long of r-m crossvein, third section one and a half the long of first two sections combined; cell a one and a half wider than cell cup; alula well developed.

Abdomen: Abdominal dorsum black pilose; black tomentum overall except a broad crossband of white tomentum on third tergite, white scales covering all seventh tergite; sides of third to sixth tergites with black scales, white scales on sides of seventh tergite; sides of abdomen with first and basal half of second tergites whitish pilose, rest black pilose. Venter black pilose, stripes of white and black scales on first three sternites. Genitalia fulvous with white hairs. Epandrium in lateral view, rectangular, lower apical margin prolonged posteriorly, lower margin clearly concave in middle, basal corner narrowed; gonocoxite narrow, basal half enlarged; gonostylus large, as long as half the width of the gonocoxite, hooked apically; epiphallus in lateral view narrow slightly curved, cap-shaped, apex not swollen, rounded; with a ventral extension broad at base with apex acuminate, portion of the epiphallus behind ventral extension longer than aedeagus; epiphallus in ventral view broad, lateral margins narrowed at middle, without spines; aedeagus broad at base narrowed at apex, not swollen dorsally; gonopore terminal.

Female. Nearly identical to male. Eyes separated by twice width of ocellar triangle.

Distribution: Mexico (Sonora), USA (Arizona).

Specimens examined: Mexico. Sonora: 4 mi S Magdalena, 19-IX-1961, R.H. and E.M. Painter (1 male PARATYPE genitalia; USNM); 4 mi S Imuris, 19-IV-1961, R.H and E.M. Painter (1 male PARATYPE; USNM); 37 mi N Hermosillo, 26-IV-1961, R.H. and E.M. Painter (1 female PARATYPE; USNM). USA. Arizona: Chiricahua Mts., 17-V-1961, R.H. and E.M. Painter (1 male PARATYPE 1 female PARATYPE; USNM).

Remarks: Chrysanthrax yaqui was included in genus Hemipenthes by Painter & Painter (1965) but the characters of the types are more congruent with that of the genus Chrysanthrax : (1) face bluntly projecting; (2) flagellomere with basal half wide, apical half slender, not styliform (3) proboscis slightly projecting beyond oral margin; (4) wing pigmentation faint forming a triangle in wing base; and (5) the contact between vein CuA1 and dm short.