At our property in Northeast Missouri we have every type of bug you can think of. 
I am particularly bothered by No-See-Ums or Chiggers.  If I spray this mixture on my legs and shoes before I tromp around in the woods I come out with no bites.

All Natural Bug Spray

You will need a 16 oz. colored
spray bottle, like this one.

Essential Oils Needed:
30 Drops Geranium Oil
30 Drops Citronella Oil
10 Drops Lemon Oil
10 Drops Eucalyptus Oil
20 Drops Lavender Oil
10 Drops Rosemary Oil

Other Ingredients:
1 Tbsp. Rubbing Alcohol
1/2 Cup Witch Hazel
1/2 Cup Water
1 Tsp, Vegetable Glycerin

Put essential oils and rubbing alcohol into bottle and shake. 
Add witch hazel and shake. 
Add vegetable glycerin and water - shake again.

Shake before each use.