What kind of spider has a black body with brown stripe on its back?

It's difficult to pinpoint the exact spider species based solely on a black body with a brown stripe on its back. This description could match several different spiders, and the specific type could depend on your location.

To give you a more accurate answer, I'd need more information, such as:

* Location: Where did you see the spider? (Country, state, region)

* Size: How big was the spider?

* Web: Did it have a web? If so, what kind of web?

* Other markings: Were there any other markings on the spider, such as spots, stripes, or patterns?

With more details, I might be able to help you identify the spider.

Important Note: It's best to observe spiders from a safe distance. If you are concerned about a spider in your home, contact a professional pest control service.