Bombus magnus?

Bombus magnus?

Observation - Bombus magnus? - UK and Ireland. Description: This queen was feeding on sallow along with a number of typical-looking lucorum and a few apparent cryptarum (distinct S on collar, near wing base). This one seems to have a broad and long collar extending well below the wing bases, but I'm not sure if th

This queen was feeding on sallow along with a number of typical-looking lucorum and a few apparent cryptarum (distinct S on collar, near wing base). This one seems to have a broad and long collar extending well below the wing bases, but I'm not sure if the collar is big enough for magnus. It didn't have the s mark, but it does have a slight nick at the wing base. Other species noted (all queens) were plenty of monticola, a single jonellus, hypnorum, hortorum & pascuorum (and a few cuckoos).