Hylaeus (Hylaeus) neatifrons 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 : 338-341

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

( Figs 5a–f , 6a–f )

Diagnosis. Male: Mark on clypeus except anterior tentorial pits, and small elongated marks on paraocular area near anterior tentorial pits (fig. 5b); frons above antennae with large free unpunctated space, distinctly depressed, about twice as big as antennal socket; propodeum TRN, OBL and lateral carina indistinct, basal area of propodeum with irregular wrinkles, central part rugose, posterior portion rugose with minute and subcontiguous punctures (fig. 5d); T1 shiny with minute and scattered punctures (fig. 5f); terminalia see Figs. 6a–f . Female: Small spot marks on paraocular area (fig. 5a); occiput lacks a distinct marginal ledge; T1 with minute and scattered punctures, shiny, interspace transverse lineolate-reticulation (fig. 5e).

Description. Male (Holotype). Measurements: BL 6.20mm; WL 3.72mm; HL 1.48mm; HW 1.52mm; CI 1.45; SI 2.08.

Coloration: Marks on clypeus, paraocular area whitish; basal spot on hind tibia yellowish; all tibial spur yellowish brown; flagellum (except 1 st flagellum) brown; tegula, veins and stigma, apical bands of tergum brown; apical part of mandibles transparent reddish brown. Other parts all black.

Structure: Clypeus reticulate-striation, punctures extremely minute, scattered, evenly distributed; supraclypeal area depressed; upper portion of paraocular area pit-reticulation, with minute to fine, dense to close punctures, lower portion of paraocular area reticulate-striation, punctures irregularly shaped; frons above antennae with large free unpunctated space, distinctly depressed, about twice as big as antennal socket; rest of frons and vertex pitreticulation, punctures smaller and denser than the upper portion of paraocular area; genal area as broad as eyes in lateral view, sparsely punctated, punctures minute and with microridges in the interspaces; malar area short, more or less 1/4 as long as width of mandible base, with weak longitudinal wrinkles; occiput lacks a distinct marginal ledge; pronotal collar roundly thickened, slightly attenuated toward middle; mesoscutum lineolate-reticulation, moderately shiny, with minute and dense to close punctures; scutellum lineolate-reticulation, closely and uniformly punctated; metanotum rugose and dull; mesopleuron moderately shiny, transverse lineolate-reticulation, in central part punctures minute and close to sparse; propodeum TRN, OBL and lateral carina indistinct, basal area of propodeum with irregular wrinkles, central part rugose, posterior portion rugose with minute and subcontiguous punctures (fig. 5d); terga transverse lineolate-reticulate, T1 shiny with minute and scattered punctures (fig. 5f), T2 and the following terga more rugose, with minute and denser punctures.

Pilosity: Hairs on apical margin of clypeus brown and very sparse; hairs on vertex brown, moderately long and dense; scape with brown hairs, long and sparse; hairs on flagellum whitish brown, dense and short; hairs on genal area short and sparse; hairs on mesoscutum, scutellum, and metanotum whitish brown, short and sparse; hairs on mesopleuron longer and denser than those on mesoscutum; posterior portion of propodeum white, long and moderately dense; pronotal collar with short sparse brown hairs; pronotal lobe with short dense whitish brown hairs; legs with long and dense whitish hairs; hairs on T1 extremely short and sparse; the following terga hairs brown, extremely short and becoming denser than those on T1.

Terminalia: See Figs. 6a–f .

Female (Paratype). Measurements: BL 6.21mm; WL 4.19mm; HL 1.36mm; HW 1.46mm; CI 1.38; SI 2.85.

Coloration: Small spot marks on paraocular area yellow; apical portion of pronotal lobe yellow; basal spot on fore tibia, basal spot on middle tibia, basal 1/4 of hind tibia yellowish; tibial spur yellowish brown; other all basitarsi, mediotarsi, distitarsi and tarsal claws brown; tegula, veins and stigma, and apical bands of tergum brown; apical part of mandibles transparent reddish brown. Other parts all black.

Structure: Clypeus, supraclypeal area, paraocular area reticulate-striation; clypeus punctures minute, scattered; supraclypeal area with little minute punctures; lower portion of paraocular area sparsely punctated, moderately shiny, upper portion with denser punctures; frons above antennae with small free unpunctated space, less than diameter of antennal socket; rest of frons and vertex pit-reticulation, punctures minute and close to sparse; genal area as broad as eyes in lateral view, densely to sparsely punctated, punctures minute and with microridges in the interspaces; malar area short, more or less 1/6 as long as width of mandible base, microridged; occiput lacks a distinct marginal ledge; pronotal collar roundly thickened; mesoscutum transverse lineolate-reticulation, moderately shiny, with minute and close to sparse punctures; scutellum similar to mesoscutum; metanotum with wrinkles, rugose and dull; propodeum the same as male’s, TRN, OBL and lateral carina indistinct, basal area of propodeum with longitudinal wrinkles, central part rugose, posterior portion rugose with minute and subcontiguous punctures (fig. 5c); T1 with minute and scattered punctures, shiny, interspace transverse lineolate-reticulation (fig. 5e), T2 and the following terga transverse lineolate-reticulation, but more rugose, and with minute and denser punctures.

Pilosity: Pilosity of female similar to male, but a little denser. Hairs on apical margin of clypeus brown and very sparse; hairs on vertex brown, long and dense; scape with sparse brown hairs; hairs on flagellum whitish brown, dense and short; hairs on genal area short and sparse; hairs on mesoscutum, scutellum, metanotum and mesopleuron brown, short and sparse; posterior portion of propodeum white, long and moderately dense; pronotal collar with short sparse brown hairs; pronotal lobe with short dense yellow hairs; hairs on T1 extremely short and sparse; the following terga hairs whitish brown, extremely short and denser than those on T1.

Type material. Holotype: 1 male, Alpine Botanical Garden , Zhongdian County, Yunnan Province, China (27°53'59"N, 99°38'19"E 3430m), 10.VI.2012, Huan Chen . Paratypes: 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; 2 females, Alpine Botanical Garden , Zhongdian County, Yunnan Province, China (27°53'59"N, 99°38'19"E 3430m) , 10. VI.2012, Huan Chen. Type material deposited in the entomological museum of China Agricultural University , Beijing, China .

Discussion. In this new species, the male head without supraclypeal mark (as in H. sinensis and H. niger ), paraocular area with small elongated marks near anterior tentorial pits (but without in H. sinensis and H. niger ). S7 developed, apical lobes wide, pectinate, inner margin with dense long hairs (looks like S7 of H. sinensis ), but the under apical parts without hairs (with long hairs in H. sinensis ); the penis valve is just slightly beyond gonostylus (but much beyond in H. sinensis ); S8 long, basal process short, apical process slender and bifid at apex, without hairs (but not obviously bifid at apex, and with some hairs in H. sinensis ).

Distribution. China, Yunnan Province.

Etymology. The species epithet is a reference to smooth, unpunctated space in front of head.

Figures

FIGURE 5. Structure of Hylaeus (Hylaeus) neatifrons sp. nov.. Female left, male right: a, b Head; c, d Propodeum; e, f Tergum (female: paratype; male: holotype).

FIGURE 6. Male (holotype) terminalia of Hylaeus (Hylaeus) neatifrons 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.