Hylaeus (Hylaeus) ascheri, Dathe, 2015

Dathe, Holger H., 2015, Studies on the systematics and taxonomy of the genus Hylaeus F. (10) New descriptions and records of Asian Hylaeus species (Hymenoptera: Anthophila, Colletidae), Beiträge Zur Entomologie = Contributions to Entomology 65 (2), pp. 223-238 : 227-228

Hylaeus (Hylaeus) ascheri spec. nov.

Figures 6–8 , 28

Diagnosis: The new species H. ascheri , H. rozenius and H. maoxianus are very similar to each other. In males of H. ascheri the penis valves are constricted, as in the other species, and both sexes are remarkably setose. But H. ascheri differs in its ivory white face coloration and especially in the different shape of the male genital capsule. The clypeus in females is black without a spot.

Description: Male. TL 4.2–4.7 (4.38) mm, WL 3.3–3.7 (3.47) mm.

Head. Proportions HL:HW 0.89, UHW:LHW 1.79, profile transverse trapezoid. Scapi black, elongate, slen- der conoid, not wider than flagella, SL:SW 2.50; flagella of medium length, black, yellow below. Mask complete, ivory white, side patches expanded to upper margin of scapi bases, connect straight to orbits or pointed towards them. Foveae faciales indistinct. Clypeus CL:CW 1.32, smooth and shiny, with only a few scattered punctures, anterior margin brown. Supraclypeal area in the middle striate, above with moderate punctation along a short median groove, lateral edges sharp, with gentle transition to the frons. Frons and vertex with subcontiguous, strong punctation, on the frons arranged in curved rows; intervals shiny; vertex with moderately dense erect pilosity. Genae normal, with elongated punctation; occiput rounded; malae narrow. Labrum and the bifid mandibles black.

Mesosoma long-oval, rounded; pilosity conspicuous, thorax and propodeum covered with protruding long white hairs, dorsally somewhat shorter. Coloration black, pronotum laterally with two short light yellow stripes, calli with light yellow spot; tegulae horn brown. Pronotum narrow, only laterally somewhat expanded, anterior margin in the middle sharp, dorsolateral angles blunt. Mesonotum finely shagreen, silkily shiny, punctation strong, close; scutellum with somewhat larger and more scattered punctation, more shiny; metanotum matt, punctate; mesopleurae with punctation similar to mesonotum, anterior margin rounded. Legs black, yellow are anterior surface of foretibiae, base of other tibiae and proximal parts of basitarsi, other tarsi partially blackened; wings slightly brown, venation brown. Propodeum totally rounded, its surface finely reticulately wrinkled, slightly shiny; areal parts not delimited from one another; basal area basally with short, rugose longitudinal wrinkles which merge caudally; propodeal furrow deep, margined.

Metasoma narrow spindle-shaped, coloration black. T1 smooth and shiny, punctation moderate, close to sparse; surface with short erect hairs; T2 and following terga somewhat more finely and densely punctate; lateral parts of terga with indistinct sparse ciliary fringes. Terminalia ( Fig. 28 ): genital capsule compact, long-oval, with enlarged gonobase and gonocoxites, gonoforcipes short and pointed; penis valves (in dorsal view) basolaterally constricted, arrow-shaped; S8 with apical lobus preapically constricted, ending in rounded lobes; S7 with proximal lobes compact, distal lobes formed as short wide flags.

Female. TL 4.2–4.4 (4.32) mm, WL 3.5–3.9 (3.72) mm.

Head. Proportions HL:HW 0.93, UHW:LHW 1.56, outline transverse elliptic. Scapi black, flagella short, black, undersides brown. Face with yellowish-white side spots, filling paraocular area up to middle of scapus bases. Foveae faciales long, reaching upper eye border. Clypeus CL:CW 1.21, longitudinally striate, matt, anteriorly with scattered shallow punctation; supraclypeal area separated from clypeus by fine seam, lower part with a similar structure, upper part with deep median sulcus, laterally punctate, with a gradual transition to the frons. Frons and vertex with subcontiguous, strong streaky punctation. Genae regular, in outline sloping below; occiput rounded; malae narrow. Labrum and the bifid mandibles black.

Mesosoma long-oval, rounded; pilosity conspicuous, thorax and propodeum covered with protruding long white hairs, dorsally somewhat shorter. Coloration black, pronotum laterally with two light yellow stripes, tegulae and calli each with a light yellow spot. Pronotum slightly expanded anteriorly, anterior margin sharp in the middle,

– 6, 7 Holotypus male. 8 Paratypus female. – Scale 0.5 mm.

dorsolateral angles blunt. Mesonotum and scutellum finely shagreen, silkily shiny, punctation strong, close; metanotum matt, more finely punctate; mesopleurae with punctation similar to mesonotum, anterior margin rounded. Legs black, yellow are bases of tibiae II and III; wings slightly brown, venation brown. Propodeum rounded, surface finely reticulately wrinkled, slightly shiny; basal area basally with short meshes, posteriorly with rugose longitudinal wrinkles which merge caudally; basal area marked by a series of pits which run into a funnel-shaped propodeal furrow, upper triangular part with fine shagreen.

Metasoma slender spindle-shaped, coloration black. T1 smooth and shiny, punctation sparse, fine; following terga finely shagreen, with shallow punctation; terga without fringes; fringe of last sternum bright.

Types: 4 ♂, 2 ♀.

Holotypus: ♂ CHINA. Sichuan Province : Lushan Mt. above Qionghai Lake , pine forest, 27°44.351N 102°20.517E, 6976 ft, 05.06.2011, leg. J.S. Ascher, L. Ding, Z. Niu & J.G. Rozen. – In coll. IZCAS Beijing .

Paratypes: 3 ♂, 2 ♀ CHINA, same collecting data. – In coll. IZCAS Beijing, AMNH New York, SDEI Müncheberg .

Derivatio nominis: The new species is dedicated to one of its collectors, Dr JOHN S. ASCHER ( Singapore and New York).

Figures

Figs 6–8: Hylaeus (Hylaeus) ascheri spec. nov.: head in frontal view; total view from dorsal.

Figs 27–30: Male terminalia: metasomal sterna 7 and 8 (S7 left ventral view, right dorsal view), genital capsule. – 27H. (Hylaeus) oliviae spec. nov. – 28 H. (Hylaeus) ascheri spec. nov.– 29 H. (Hylaeus) maoxianus spec. nov. – 30 H. (Hylaeus) rozenius spec. nov. – Scale 0.2 mm.