what are these bugs?

[dalah]

can anybody help me? our melon seeds are coming up, and they are being attacked by some kind of beetle. they have black and white stripes on thier backs and orange heads, I keep finding three at a time on each sprout.
Anybody know what they are and how I can get rid of them organically? they seem to only go for the American melons, and leave the others alone. (Thayer verses charentais from Baker Creek heirloom seeds.)

[Mary]

Hi, I have a book about insects and it says that a cucumber beetle is striped and the first and greatest damage from the beetles results from their feeding on stems and seed leaves when the plants are just pushing through the ground and before they have developed true leaves.later in the season when another generation of beetles appears , the leaves, blossoms and fruits of vine crops may be seriously damaged.It says to heavy mulch. A spray can be made of wood ashes and a handful of hydrated lime in two gallons of water, treat both sides of leaves.Try planting marigolds,radishes,nasturtiums around your plants.it also says to plant castor beans.