Hylaeus (Hylaeus) bimaculatus Chen and Xu, 2013

Chen, Huan & Xu, Huanli, 2013, Full title of manuscript: Five new species of the genus Hylaeus (Hymenoptera: Colletidae) from China, Zootaxa 3669 (3), pp. 331-349 : 341-344

Hylaeus (Hylaeus) bimaculatus Chen and Xu , sp. nov.

( Figs 7a–f , 8a–f )

Diagnosis. Male: Paraocular area marks ending acutely around and beyond the level of upper margins of antennal sockets (fig. 7b); propodeum TRN, OBL and lateral carina indistinct, basal area of propodeum with dense longitudinal wrinkles (fig. 7d); T1 transverse lineolate-reticulation, shiny with shallow, minute and sparse to scattered punctures (fig. 7f); terminalia see Figs. 8a–f . Female: Only two small spot marks on paraocular area (fig. 7a); T1 transverse lineolate-reticulation, shiny with minute and scattered punctures (fig. 7e).

Description. Male (Holotype). Measurements: BL 6.3mm; WL 4.7mm; HL 2.15mm; HW 2.16mm; CI 1.57; SI 2.46.

Coloration: Marks on clypeus and paraocular area whitish. Tibial spur yellowish brown. Apical part of mandibles and tegula transparent reddish brown. Flagellum, veins and stigma, claws, and apical bands of tergum brown. Other parts all black.

Structure: Marks on clypeus and paraocular area well developed, paraocular area marks ending acutely around and beyond the level of upper margins of antennal sockets (fig. 7b); clypeus striation, convex, punctures minute and scattered; supraclypeal area dull, lineolate-reticulation, weakly convex, punctures minute and close to sparse; upper portion of paraocular area pit-reticulation, with deep, fine and subcontiguous punctures, lower portion of paraocular area longitudinal lineolate-reticulation, punctures deep and scattered; frons and vertex punctures minute and subcontiguous to contiguous; frons above antennae with large unpunctated space, twice longer than diameter of antennal socket; genal area as wide as eyes in lateral view, recticulate-striation, punctures minute and dense, irregularly shaped; scape slightly turbinate broadened, punctures minute and sparse; the 1 st and 2 nd flagellum slightly shorter than others; malar area more or less 1/3 as long as width of mandible base, with longitudinal wrinkles; pronotal collar roundly thickened, with wrinkles; mesoscutum transverse lineolate-reticulation, moderately shiny, punctures uniformly distributed, minute to fine and dense to close; scutellum transverse lineolate-reticulation, weakly convex, punctures similar to mesoscutum; metanotum dull with wrinkles, without punctures; mesopleuron transverse lineolate-reticulation, in central part punctures minute to fine and dense to close, with up and down two sag area; propodeum TRN, OBL and lateral carina indistinct, basal area of propodeum with longitudinal, uniformly distributed wrinkles, central part close to transverse lineolate-reticulation, posterior portion dull with minute and subcontiguous punctures (fig. 7d); terga transverse lineolate-reticulate, T1 shiny with shallow, minute and sparse to scattered punctures (fig. 7f), T2 and the following terga punctures denser and more coarse.

Pilosity: Hairs on frons and vertex long and brown, insert with some black hairs; hairs on lower portion of clypeus and paraocular area brown, stout but sparse; inner margin of scape with brown long hairs; hairs on flagellum white, dense and short; hairs on mesoscutum, scutellum, metanotum long and brown; hairs on mesopleuron white, long and sparse; hairs on posterior surface of propodeum white, long and moderately dense; hairs on T1 short and sparse, white or brown; hairs on following terga white or brown, extremely short and becoming denser than those on T1.

Terminalia: See Figs. 8a–f .

Female (Paratype). Measurements: BL 5.81mm; WL 2.43mm; HL 1.28mm; HW 1.43mm; CI 3.36; SI 3.68.

Coloration: Marks on paraocular area yellowish. Tibial spur yellowish brown. Flagellum, tarsal claws, and apical bands of tergum brown. Apical part of mandibles, tegula, apical portion of pronotal lobe transparent reddish brown. Other parts all black.

Structure: Only two small spot marks on paraocular area (fig. 7a); clypeus and supraclypeal area striation, slightly shiny, punctures minute and sparse, or irregularly shaped; upper portion of paraocular area dull, punctures irregularly shaped, lower portion of paraocular area transverse striation with minute and subcontiguous punctures; frons and vertex punctures uniformly distributed, minute and subcontiguous to contiguous; malar area extremely short, microridged; genal area as broad as eyes in lateral view, reticulate-striation, moderately shiny with minute and sparse punctures; punctures on scape minute and sparse; pronotal collar roundly thickened; mesoscutum transverse lineolate-reticulation, moderately shiny, punctures uniformly distributed, minute and close; scutellum moderately shiny with minute and dense to subcontiguous punctures; metanotum weakly convex, punctures minute and subcontiguous, with wrinkles; mesopleuron the same as the male, transverse lineolate-reticulation, in central part punctures minute to fine and dense to close, with up and down two sag area; propodeum TRN, OBL and lateral carina indistinct, basal area of propodeum narrow, with sparse uniformly distributed wrinkles, central part close to lineolate-reticulation, posterior portion dull with minute and subcontiguous punctures (fig. 7c); T1 transverse lineolate-reticulate, shiny, punctures minute and scattered, T2 similar to T1, and the following terga with minute and denser punctures (fig. 7e).

Pilosity: Hairs on frons and vertex brown, short and sparse; hairs on apical margin of clypeus brown and very sparse; hairs on flagellum white, dense and short; hairs on mesoscutum, scutellum, and metanotum brown, short and sparse; hairs on mesopleuron white, long and sparse; hairs on posterior surface of propodeum white, long and moderately dense; hairs on T1 extremely short and sparse; hairs on the following terga white, extremely short, becoming denser than those on T1.

Type material. Holotype: 1 male, the Napa Lake La Prairie protection zone, Zhongdian County, Yunnan Province, China (27°54'27"N, 99°37'41"E 3280m), 8.VI.2012, Huan Chen . Paratypes: 2 males, the Napa Lake La Prairie protection zone, Zhongdian County, Yunnan Province, China (27°54'27"N, 99°37'41"E 3280m) , 8. VI.2012, Huan Chen. 1 female, the Napa Lake La Prairie protection zone, Zhongdian County, Yunnan Province, China (27°54'27"N, 99°37'41"E 3280m) , 8. VI.2012, Huan Chen. Type material deposited in the entomological museum of China Agricultural University , Beijing, China .

Discussion. This new species has its own special face marks; the shape of S7 similar to H. jantaris and H. ebmeri , but its apical lobes of S7 wider, inner margin with dense long hairs, and outer margin without pectinate structures; S8 long, apical process slender and long, become wide and bifid with two angles at apex, with some short hairs (without hairs in H. jantaris and H. ebmeri ).

Distribution. China, Yunnan Province.

Etymology. The specific epithet is meaning two spots on face of female.

Figures

FIGURE 7. Structure of Hylaeus (Hylaeus) bimaculatus sp. nov.. Female left, male right: a, b Head; c, d Propodeum; e, f Tergum (female: paratype; male: holotype).

FIGURE 8. Male (holotype) terminalia of Hylaeus (Hylaeus) bimaculatus sp. nov.. a. Ventral view of genitalia; b. Dorsal view of genitalia; c. Lateral view of genitalia; d. Dorsal view of S7; e. Dorsal view of S8; f. Lateral view of S8. Scale bar=0.5mm.