(Figs 3B, 4A–F, 41B, 41C, 43B, 47A)

Colletes harreri Kuhlmann, 2002: 1162 (holotype ♂, China, Xizang, Shigatse [ZMB]).

Colletes harreri; Niu et al. 2013b: 105, 2014b: 475; Ascher & Pickering 2021.

Diagnosis. Females of C. harreri can be recognized among the Tibetan Colletes through the following set of features: clypeus longer than broad, paraocular area with pale-yellow and black hairs intermixed and hind basitarsus with pale setae. Males are diagnosable through the combination of malar area 1.5× as long as basal width of mandible, mesoscutal black hairs present and S7 apicolateral lobe subrectangular. Colletes harreri is most similar to C. harrerioides, but the females of the former are distinct in having the malar area 1.25× as long as basal width of mandible (malar area only 0.75× as long as basal width of mandible in females of the latter) and the T2 with basal band (T2 without basal band in females of the latter). Males of the two species are different in that the hind basitarsus is 4.75× as long as broad in C. harreri (hind basitarsus 4.25× as long as broad in C. harrerioides) and the S7 has subparallel lateral margins in the former (S7 with lateral margins diverging anteriorly and converging posteriorly in the latter).

Material examined. Published records — CHINA, Xizang: Dinggyê Xian, 28.30 87.70, 4200 m, 10.viii.1983, S Luo, 2 ♂. Linzi Xian, Bank of Niyang River, 29.66 94.35, 2990 m, 11.viii.2012, ZQ Niu, 1 ♂; 15.viii.2012, ZQ Niu, 2 ♂. Linzhi Xian, Shengnong Hotel, 29.66 94.68, 3003 m, 16.viii.2012, ZQ Niu, 1 ♀. Nêdong Xian, 29.20 91.70, 4600 m, 14.vi.1981, TL Cheng, 1 ♂. Xigazê Xian, 29.20 88.80, 3800 m, 13.v.1961, LY Wang, 1 ♂; 20.v.1961, LY Wang, 2 ♂; 27.v.1961, LY Wang, 1 ♂; 12.vi.1961, LY Wang, 10 ♂; 6.vii.1961, LY Wang, 1 ♂.

New records — CHINA, Xizang: Bailang, Duqiong, Qiaga, 29.0692 89.2549, 3901 m, 25.vii.2019, D Zhang 23.vii.2017, D Zhang & QT Wu, 1 ♀. Linzhi, Changdu, Road G 318 km 3893, 29.4845 96.6415, 3915 m, 5.viii.2017, D Zhang & QT Wu, 1 ♂. Nielamu, Chundu Village, Ancient Castle, 28.7757 86.3521, 4390 m, 13.vii.2018, QT Wu, 1 ♀. Nielamu, Jlanggang Town, 28.2359 85.5865, 3954 m, 4.viii.2019, D Zhang & QT Wu, 4 ♂. Nielamu, Rujia Village, 28.3618 86.0734, 4286 m, 15.vii.2018, QT Wu, 7 ♂. Renbu, Qiewa, Qieda, 29.3064 89.7699, 3746 m, 24.vii.2019, D Zhang & QT Wu, 2 ♂. Rikaze, Bailang, Qiaga, 29.0694 89.2548, 3961 m, 21.vi.2020, QT Wu & D Zhang, 2 ♀ 9 ♂. Rikaze, Bailang, Wetland Park, 29.1446 89.2449, 3888 m, 22.vi.2020, QT Wu & D Zhang, 27 ♂. Rikaze, Jilong, Public Forest, 28.5221 85.2173, 3448 m, 8.vii.2020, QT Wu & D Zhang, 1 ♂. Rikaze, Jilong, Road G 216 km 3433, 28.8233 85.2958, 4023 m, 6.vii.2020, QT Wu & D Zhang, 16 ♂. Rikaze, Tingri County, Za Village, 28.5319 87.5345, 4174 m, 12.vii.2018, QT Wu, 2 ♂. Shannan, Naidong, 29.1156 91.7125, 3574 m, 27.vii.2017, D Zhang & QT Wu, 8 ♀; 28.vii.2017, D Zhang & QT Wu, 5 ♀ 1 ♂. Shannan, Naidong, Changzhu, 29.1679 91.7348, 3602 m, 28.vii.2017, D Zhang & QT Wu, 3 ♀. Shannan, Naidong, Gezhong Town, 29.2902 91.8186, 3568 m, 27.vii.2017, D Zhang & QT Wu, 13 ♀. Shannan, Qiongjie County, 29.2064 91.7726, 3654 m, 27.vii.2017, D Zhang & QT Wu, 1 ♀ 1 ♂. Shannan, Road S 202, 29.1167 91.7885, 3644 m, 29.vii.2017, D Zhang & QT Wu, 2 ♀ 3 ♂. Shannan, Yongbulakang, 29.1048 91.8383, 3683 m, 29.vii.2017, D Zhang & QT Wu, 35 ♀ 6 ♂.

Distribution. Western China (Xizang).

DNA barcode. Available (3 ♀ and 4 ♂). See also Fig. 1 and Table 1.

Floral hosts. Leguminosae: Trifolium repens L.; Tamaricaceae: Tamarix chinensis Lour.

Remarks. Variation in body size of C. harreri is enormous, ranging between 8.0– 11.5 mm in females and 7.0–10.0 mm in males.