Stinging Bumblebee vs Bumblebee

Can anyone tell me what are the markers that differentiate stinging bees from just plain bees? I've compared pics on WOBP but I just can't really see the differences. Thanks!

i just hatch one enchi bumblebee but it was obvious. the pattern is more reduce and the yellow i almost absent of noise. the color is a bit brighter . and the black is not as deep . difficultt to explain but if you have both you will easily make the difference