Andrena (Habromelissa) nantouensis Dubitzky, 2006, sp. n.

Andrena (Habromelissa) nantouensis sp. n.

(Figs 2 A, 3J, 5B)

Male. BL: 8.6 mm. FWL: 5.9 mm.

Structure. Head oval, about 1.3 times broader than long in frontal view. Mandibles long, falcate with distinct preapical tooth (Fig. 2 A). PLR rectangular, smooth and shiny, distinctly protruding apical margin of clypeus. Clypeus shiny, about twice as broad as long with distinct punctation (>1). Disc of clypeus strongly flattened to slightly concave, weakly tesselate. POA on lower part smooth and shiny, with distinct, dense punctation (<1) and oblique honeycombed punctation (<0.3) on tesselate and dull upper part. SCA dull, tesselate to slightly wrinkled with indistinct weak punctation. Frons dull to weakly shiny, with strong longitudinal notches and large honeycombed punctation. GA smooth and shiny, with weak dispersed punctation (>1), about 1.4 times broader than compound eye in lateral view (Fig. 2 A). Lower part of hind margin of GA nearly rectangular arcuate, forming a weak lamella apically. Vertex behind ocelli rugously tesselate, dull, with inconspicuous weak punctation. Lateral parts of vertex becoming more and more smooth and shiny, similar to GA. Hind margin of vertex strongly concave, weakly carinate in the middle. AS 3 extremely short, only 1.3 times as long as broad and only 1.1 times longer than AS 4. AS 4– AS 12 about 1.4 times longer than broad, AS 13 about twice as long as broad. Pronotum strongly tesselate, dull, laterally distinctly carinate. Scutum with large distinct punctation (<1), weakly tesselate near apical margin, smooth and shiny on disc. Scutellum smooth and shiny, with irregular strong punctation. Metanotum slightly tesselate, weakly dull to shiny. PT strongly wrinkled basally, nearly smooth and shiny apically. DLP, LP and declivous part of propodeum tesselate, dull to weakly shiny. Mesepisterna with distinct large punctation, strongly tesselate and dull on upper part, nearly smooth on lower part. Tegulae smooth and shiny. Veins 1m­cu and 2m­cu respectively joining 2nd and 3rd submarginal cell at distal apex. Legs, especially hind leg extremely slender. Basitarsus of hind leg about 0.8 times as long as tibia. Claws bidentate. T polished, shiny, disc with distinct punctation (1), more dispersed (1) on T 1. Marginal zone nearly impunctate. S weakly tesselate, shiny, with inconspicuous punctation, punctation most dense apically. Structure of S8 and genitalia as in Figs 3 J and 5B.

Integument colour. Mandibles black, apically reddened. Clypeus ivory except black apical margin and two triangular brownish maculations. Antenna blackish­brown on both sides. Other parts of head, as well as thorax black to blackish­brown. Legs dark brownish, spurs yellowish­grey transparent. Claws yellowish­grey basally, reddish­brown apically. Tegulae dark brownish transparent, wings bright brownish transparent. Veins of wings and stigma brownish. T uniformly blackish­brown, S dark brownish.

Pubescence. Head with mainly short to medium­long blackish­brown hairs, except bright yellowish­grey hairs on GA and hind margin of vertex. Thorax with medium­long to long rather sparse pubescence of bright yellowish­grey hairs except blackish­brown hairs on scutellum and small region below insertion of wings. Legs with yellowish­grey hairs basally (coxa to femur) and brownish hairs apically (apical part of femur to tarsi). T 1–4 with inconspicuous sparse pubescence of mainly short brownish hairs. T 5 and 6 with rather dense pubescence of medium­long brown hairs. S with sparse, yellowish­grey to bright brownish hairs.

Female. Unknown.

Diagnosis. The following character combination diagnoses A. nantouensis as a member of subgenus Habromelissa: Male mandibles long, falcate; male clypeus with yellow coloration; lateral parts of pronotum strongly carinate; characteristic structure of PT and DLP; the overall form of male genitalia, S7 and S8. Within this subgenus the new species is most similar to A. (Habromelissa) omogensis Hirashima, 1953 from Japan from which it can be distinguished by the following characters (characters of A. omogensis given in parentheses): Clypeus smooth and shiny (tesselate, weakly dull), with more dense and stronger punctation. Disc of clypeus flattened to slightly concave (weakly convex). GA distinctly broader than compound eye in lateral view, smooth and shiny (distinctly shorter than compound eye, distinctly tesselate, weakly dull). Hind margin of vertex strongly concave (slightly concave). Scutum nearly smooth, shiny with distinct, dense punctation (<1) (tesselate, with indistinct, more dispersed punctation (1)). Scutellum smooth and shiny, with distinct strong punctation (weakly tesselate, with indistinct, small punctation). PT with strong, coarse wrinkles basally (strongly granulate to extremely fine wrinkled basally). Punctation of T especially T1 strong and distinct (small indistinct, on T1 nearly absent). Pubescence of face including clypeus and lower parts of vertex, as well as disc of scutum and scutellum blackish­brown (pubescence yellowish­grey). Pubescence of T bright brownish (whitish­grey). Males of A. nantouensis are clearly distinguished from all other species of Andrena occuring on Taiwan by the long and falcate mandibles, the broadened GA and the strongly carinate pronotum in combination with a yellow coloured clypeus.

Etymology. The specific epithet refers to the Nantou county district of Taiwan, where this species was collected.

Type material. Holotype: ɗ, Taiwan (ROC), Nantou Hsien, Meifeng, 2150 m, 28.–29.VIII.1981, leg. L. Y. Chou & S. C. Lin (TARI).