Here are a collection of Midges and Buzzers (chironomids)
http://donaldnicolson.webplus.net/page7.html
Here are some Nymph patterns worth trying:-
http://donaldnicolson.webplus.net/page5.html
This is a UK website with a lot of ideas for tying your own :-
http://www.ukfishingflies.co.uk/acat...elections.html
Best of luck, there is nothing like hooking on one of yoyr own flies.