Colletes yanruae sp. n.

(Figs 29 a–e, 32w)

Diagnosis. The female belongs to a group of species with very finely and densely punctate terga (Fig. 29 d) namely C. babai Hirashima & Tadauchi (only known from Japan), C. sodalis and C. heilongtanensis sp. n. C. yanruae differs from C. babai and C. sodalis in the distinctly narrower apical tergal hair bands (Fig. 29 d) and the much longer hairs on the scutum (about twice as long as in latter species) (Fig. 29 c) while C. heilongtanensis sp. n. has a more sparsely punctate and shiny clypeus (Fig. 24 b). The male is unknown.

Description. Female, BL= 9.5–11mm (Fig. 29 a); head broader than long, HW: HL=58: 50 (Fig. 29 b); gena nearly as wide as eye in lateral view, GW: EW=10: 11; width of metasoma as broad as that between tegulae, MtW: TW=65: 65. Clypeus broader than long, densely and coarsely punctate (Fig. 29 b); disc of scutum shiny, densely punctuate, i=0.5–1.5d (Fig. 29 c); malar area medially shorter than width of mandible base, only 1/2 long as the width of mandible base; facial fovea as broad as the width of antennal flagellum; vertex behind eye rounded; propodeum laterally covered with sparse long erect hairs, integumental sculpture completely visible; posterior margin of T1 opaque dark brown; punctation on disc of T1 fine and dense, i=0.5–1.0d (Fig. 29 e); T1–T5 with narrower apical hair bands (Fig. 29 d), apical hair band on T1 broadly interrupted medically, T2 without basal hair band, apical hair band on T2 nearly 1/6 width as that of the related exposed T2 (Fig. 29 e); sloping anterior and lateral anterior parts of T1 sparsely covered with erect white long plumose hairs (Fig. 29 d, 29e); Antennal flagellum ventrally black; distitarsus of all legs dark brown, other parts black. Face, vertex and scutum covered with dark paler yellowish white erect long plumose hairs, intermixed with some black hairs (Figs. 29 b, 29c), especially pilosity on scutum much longer (Fig. 29 e); mesepisternum covered with sparse long paler white plumose hairs (Fig. 29 a).

Male unknown.

Type material. Holotype: 1♀, China, Yunnan, Lijiang, Yulong Shan (100º18′E 27º06′N), 2850m, 19.VII.1984, coll. Chang-Fang Li; Paratypes: 3♀, China, Yunnan, Lijiang, Yulong Shan (100º18′E 27º06′N), 2850m, 17.VII.1984, coll. Chang-Fang Li; 2♀, China, Yunnan, Lijiang, Baishui (103º54′E 24º30′N), 3200m, 17.VII.1984, coll. Jian-Guo Fan.

Distribution. China (Yunnan) (Fig. 32 w).

Floral records. No record.

Etymology. The specific name is dedicated to Professor Yan-Ru Wu of Institute of Zoology, Chinese Academy of Sciences for her contributions to bee taxonomy.