Hawthorne, we have four of them in our front lawn. I'm attaching photos of the situation. I noticed a sudden drop of leaves in approximately one week. Realizing that it's just a tad early for the trees to shed their leaves, I took a closer look. Discovering what seems to be some kind of parisitic attack I don't know what to make of it. One of the trees (tree #1 in phototj107) lost most of it's leaves, with a thin layer of leaves all the way at the top. The other trees are covered in these "things". Any assistance will be greatly appreciated.
-M p.s. for photos of the problem, please see alt.binaries.pictures.gardens under the same topic subject.