Ent. Ber. Amst.
A new bumblebee species of the subgenus Megabombus is described from the Chilean Lake District. The type series consists of 74 queens, 36 workers and a single male. Queens show a tendency to melanism as has also been observed for the European B. hortorum and B. ruderatus. B. villarricaensis is both morphologically and in colouration close to those species but a number of differences are enumerated. The very considerable geographic separation from the known Garden bumblebees would also support specific ranking.
van Asperen de Boer, J. R. J., "A note on Bombus rohweri with a description of the queen (Hymenoptera: Apidae)" (1993). An. Paper 143.
Available for download on Friday, January 01, 4500