Melon Pest - Grasshoppers
Content from UC IPM: http://www.ipm.ucdavis.edu/
DESCRIPTION OF THE PESTS
Grasshoppers may occasionally attack cucurbit crops, particularly if planted adjacent to foothill rangeland. They normally migrate from the range into cultivated areas as vegetation on the rangeland dries up.
Grasshoppers destroy leaf tissue and, if present in extremely large numbers, will consume the entire plant. They may also chew on fruit, scarring the surface and netting of cantaloupes.