Yes they are, Buzzer is just the name given to any of the midges pupa on stillwaters, because the adults buzz around.
You can tie them any size you want, on stillwater they tend to be larger than in streams.
Have a look here, there are quite a few patterns from size 10 to 18. About four or five pages of them.
http://www.dtnicolson.dial.pipex.com/page7.html

Hope this is of use.