Empis (Xanthempis) fagina, Daugeron, Christophe, 2009

Daugeron, Christophe, 2009, Two new species of Xanthempis Bezzi (Diptera, Empididae, Empidinae) endemic to the Pyrenees, Zootaxa 2087, pp. 59-64 : 60-61

Empis (Xanthempis) fagina , sp. nov.

( Figs. 1, 3 A)

Diagnosis. A yellow species with occiput with pair of subrectangular blackish spots, scape and pedicel yellowish, postpedicel and style black; scape and postpedicel not lengthened; male hypopygium characteristic: cercus with a long anterodorsal projection, phallus rather short, truncate.

Description. Male. Head. Occiput with pair of subrectangular blackish spots, strong setae. Ocellar triangle not strongly prominent with pair of strong, rather long setae. Frons more or less horizontal with a few short lateral bristly-hairs. Antenna with scape, pedicel, base of postpedicel yellowish, postpedicel, style black; scape, postpedicel not particularly long, style distinctly longer than pedicel. Labrum about 2.5x head height, palpus yellow. Eyes dichoptic with frons as wide as face, all ommatidia subequal.

Thorax entirely yellow. Antepronotum bilobed with rather short, spine-like lateral setae. Proepisternum and prosternum with a few short yellowish bristly-hairs. Acrostichals absent, dorsocentrals uniserial, strong, rather long. Other strong, long setae as follows: 1 postpronotal, 1 presutural and postsutural supraalars, 2 notopleurals, 1 postalar, 2 apical scutellars. Scutellum with pair of fine, short subapicals. Laterotergite with 2 strong, long anterior setae and a few fine, short posteriors.

Legs with a few distinct setae on tibiae dorsally and on tarsomeres apically.

Wing (about 6.5 mm) with veins somewhat yellowish at base, complete (except Sc), well sclerotised.

Abdomen entirely yellow with rather distinct black marginal setae on the first three terga.

Hypopygium. Cercus with long anterodorsal projection, epandrium with strong, long dorsal setae subapically, hypandrium membranous basally with apical and subapical pair of distinct short spines, phallus rather short, truncate.

Female similar to male except for usual sexual differences.

Material examined. Holotype 3: France, Haute-Garonne, Gar-Cagire, beech forest, 1250–1350 m, 42°96’N, 0°69’E, 11.VII.–25.VII.2008, Malaise trap ( MNHN).

Paratypes: 32 3, 41 Ƥ with same data; 44 3, 21 Ƥ with same data but 27.VI.–11.VII.2008 ( MNHN, NHM).

Derivatio nominis. From the Latin word faginus, a, um meaning from beech on account of the habitat of the species.

Distribution. France (Pyrenees).

Discussion. This species is found in the beech forests of the Pyrenees in July. It is distinguished from the other species of the subgenus by the combination of the following characters: presence of two black subrectangular spots on the occiput, antenna bicolor (scape and pedicel yellow, postpedicel black), and the

Figures

FIGURE 3. Occiput and scutum in dorsal view, A, E. (X.) fagina, sp. nov.; B, E. (X.) virgulata, sp. nov.