A large bumblebee, the queen has a body length of 24 to 28 mm (0.94 to 1.10 in) with a long proboscis, a very oblong head and dark wings. The males and workers are considerably smaller than the queen. The thorax is yellow with a broad, median, black band. The abdomen of the queen is completely black, while the males and workers have the first tergite (abdominal segment) and the centre of the second yellow, the middle part black and the tail white, except the last tergite, which is black.
B. argillaceus is found from the eastern Mediterranean to the Alps in France, Italy, Switzerland, and Austria, over Hungary north to Cluj in Romania. In the east, it reaches eastern Kazakstan, and in the south and south-east the Balkans, Crete, Cyprus, Turkey, the Caucasus, and northern Iran.
- "Bombus argillaceus". Integrated Taxonomic Information System.
- Pierre Rasmont. "Bombus (Megabombus) argillaceus (Scopoli, 1763)". Université de Mons. Retrieved 12 January 2013.
- "Tonerdhummel – Bombus argillaceus" (in German). Wildbienen. Retrieved 27 January 2013.
- Pierre Rasmont. "Bombus (Megabombus) argillaceus (Scopoli, 1763)". Atlas Hymenoptera – Bombus of Turkey. Université de Mons. Retrieved 27 January 2013.