The American Black Widow should have nothing upon its back but the black color it is. Specfically, the hour glass is on the belly of the spider.
black widow
Black widow
black widow
A black widow spider is black with a red mark on it's abdomen; this might or might not be what you meant. The black widow sometimes has a red mark on her back, as well. The red backed spider of Australia, a relative of the black widow, has an orange red mark on the back.
A black widow. This spider is only a black widow if the entire spider is black, with a round-ball looking back-body, female variety if there is a red hourglass shape marking on the underside of the spider. From the top black widows are completely black.
The hump on its back
The black widow spider.
A black spider with a red back and thick fuzzy legs is commonly called a jumping spider. The formal name is Phiddipus audax.
Brown Widow Spiders. When the subject of dangerous spiders comes up, the average person usually thinks about the black widow spider. Their shiny black body with a prominent red hourglass marking on the underside of the abdomen is an image that readily comes to mind. Source: Google.com
The Black Widow spider's scientific name is Latrodectus Hesperus. That means western Black Widow spider.
the black widow is a type of spider, and spider webs dont have doors
Black widow