It's Springtime in Walnut Grove and Miss Beadle has assigned a new homework assignment: Bug Collecting. Carrie, remember her, wants to tag along in the outdoor fun and eventually finds herself trapped. Enter Wendall Loudy, a resident of Walnut Grove, is trying to turn his life around after a two decade old incident which still has Mr. Hanson fuming.    How many different species of bugs are there in the Walnut Grove/Hero Township area? If Wendall Loudy has been around for Twenty years or so, why is it the first time we ever hear about him?  Carl Sanderson, Really?