Answer by  
                                                                                          sanityrose (2664)
                                                            
                          
                          
                                                          The black and yellow spiders you are seeing all over Maine are often called writing spiders(argiope aurantia). They get the name for their beautiful spinning abilities. Since they're most often found in gardens they're also called golden garden spiders, black and yellow garden spiders, or simply garden spiders.