Question
How do I get rid of or protect against the mites next year? From the information gathered so far, I understand that these mites cause no entensive damage to the tree , however , the mites look unsightly and some of the leaves are turning brown already. It is a young tree; I have had it for about 7 years. It is now about 14 feet high and providing excellent shade to our patio. Am going to have to get rid of it or is there some kind of spray that will banish the mites forever...... Thank You in advance.

Answer
Once the galls are formed by the  gall midge or mite there is no real way to get the insecticide to the "bug".
Look At this web link and you will see there is only a small window of opportunity to get an insecticide to the young insect before it get incased in the gall. Although the leave of the tree may look real bad the over health of the tree is not really effected by the galls. Some leaves may fall off prematurely but there will be enough leaf surface left to produce food for the tree to grow. In general, these galls are not harmful to the health of a tree. The brilliant red color associated with these galls generally alarms some people who believe the trees are diseased or seriously damaged. Feeding by eriophyid mites appears to stimulate the formation of galls on the upper and lower surface of the leaves. Occasionally, photosynthesis (food making process by plants) may be reduced in individual leaves that are heavily infested. If many leaves on a tree are heavily infested, there may be some reduction in growth.
In general, leaf galls do not seriously affect the normal growth of a tree. Thus, chemical control is seldom suggested. If indicated, the best time to treat an infested tree with a registered insecticide applied according to label directions for management of eriophyid mites is mid-April, before buds swell. Adults move from their overwintering sites to new growth at this time of the year. This treatment may help reduce the eriophyid mite population on an infested tree. Application of some formulations of carbaryl (Sevin, etc) are labeled for control of mites on shade trees. However, because the galls do not affect tree health, applications are not necessary.

http://ohioline.osu.edu/hyg-fact/2000/2004.html