I found a caddisfly (I'm reasonably sure), approx. 1.5" long including antennae, with the antennae approx. 0.5" long and the wings approx. 1" long. It has a fuzzy body and all, and looks almost identical to this one, except the white markings on the wings are two long white stripes beginning near the base of the wing and running almost to the end of the wing, and the smaller white stripes at the end of the wing, above the top stripe, are thinner than in this picture. There are three pair of black spots on top of the abdomen, and each black spot has a white dot inside it. I would say it's the same as above, but I live in the Sierra Nevada mountains in California, and this species doesn't seem to be common here. Also, I found it in a bucket of sand that I use to sprinkle on the ice and snow, far from the creek, which is frozen now anyway. Any thoughts? I'm new to this, so forgive the inaccuracies of terminology and feel free to educate me. Thank you! Also, I just realized its antennae are not as long as its body, as in this caddisfly, so there are more differences. I've looked everywhere I can think of, online and in my books, and can't identify. Any help possible?

It is a species of Hesperophylax, family Limnephilidae. Indeed they are very distinctive! Collectively, the family is the "northern caddisflies."