59. Bombus (Bombus) ignitus Smith

(Figs 120, 121)

Bombus ignitus Smith, 1869:207.

Taxonomy. Revised by Williams et al. (2012b).

Material examined. 36 queens, 871 workers, 285 males (IAB).

Distribution in North China. Primarily in the Yanshan mountains, the loess plateau and the Qinling mountains. Abundant at low to medium elevations of the Yanshan mountains in Beijing and northern Hebei, and at medium elevations of the Qinling mountains in southeastern Gansu and southern Shaanxi. Common at medium elevations of the loess plateau in eastern Gansu and central Shaanxi. Rare at low to medium elevations of the Zhongtiaoshan mountains in southernmost Shanxi, and at high elevations of the edge of the east Qinghai-Tibetan plateau in Gansu. 135 localities (Fig. 120) between 134–3432 m (IAB).

Similar species in North China. This species is similar in its red-tailed colour pattern to B. koreanus (see the key; Figs 39, 121).

Distribution in China. Beijing, Tianjin, Hebei, Shanxi, Liaoning, Jilin, Henan, Chongqing, Sichuan, Yunnan, Shaanxi, Gansu, Qinghai (IAB).

Forage plants. ALLIACEAE: Allium fistulosum; APIACEAE: Foeniculum vulgare; ARALIACEAE: Aralia chinensis, Fatsia japonica; ASTERACEAE: Carduus acanthoides, Cirsium monocephalum, C. shansiense, Cosmos bipinnatus, Dahlia pinnata, Echinops sphaerocephalus, Helianthus annuus, Ligularia intermedia, Ixeridium sonchifolium, Rudbeckia hirta, R. laciniata; Saussurea pulchella, Saussurea sp.; Tagetes patula; BEGONIACEAE: Begonia grandis; BUDDLEJACEAE: Buddleja officinalis; CLUSIACEAE: Hypericum perforatum; CONVOLVULACEAE: Convolvulus arvensis, Ipomoea nil; CUCURBITACEAE: Cucumis sativus, Cucurbita moschata, Thladiantha dubia; FABACEAE: Albizia julibrissin, Astragalus dahuricus, Campylotropis macrocarpa, Coronilla varia, Lablab purpureus, Lespedeza bicolor, L. daurica, Piptanthus concolor, Phaseolus vulgaris, Robinia pseudoacacia, Sophora davidii, S. japonica, Trifolium pretense, T. repens, Vicia amoena, V. cracca, V. unijuga, Wisteria villosa; LAMIACEAE: Agastache rugosa, Caryopteris divaricata, Elsholtzia ciliata, Leonurus japonicus, L. macranthus, L. sibiricus, Nepeta cataria, Phlomis umbrosa, Salvia farinacea, Stachys sieboldii, Vitex negundo; LYTHRACEAE: Lagerstroemia indica, Lythrum salicaria; MAGNOLIACEAE: Yulania denudata; MALVACEAE: Abutilon theophrasti, Alcea rosea, Hibiscus syriacus, Hibiscus trionum, Malva cathayensis; OLEACEAE: Ligustrum lucidum; ONAGRACEAE: Chamerion angustifolium, Oenothera biennis; PAPAVERACEAE: Corydalis sp., Dicranostigma leptopodum, Macleaya microcarpa; POLYGONACEAE: Polygonum nepalense; RANUNCULACEAE: Anemone tomentosa, Trollius chinensis; ROSACEAE: Amygdalus davidiana, A. persica, A. triloba, Armeniaca sibirica, A. vulgaris, Cerasus campanulata, C. tomentosa, Malus pumila, Potentilla chinensis, Rosa chinensis, R. filipes, R. xanthina, Rubus crataegifolius; SALICACEAE: Salix caprea; SCROPHULARIACEAE: Paulownia elongata, Veronicastrum sibiricum; SOLANACEAE: Capsicum annuum, Petunia hybrida, Solanum japonense, S. melongena; THYMELAEACEAE: Wikstroemia chamaedaphne; TILIACEAE: Grewia biloba.