The male green jumping spider has a dark red head and a bright green body. The scientific name for this spider is Mopsus Mormon.
Sounds like a black widow spider - does it look like this (check related links)?
An black widow
A North American Johnson jumping spider
the grand daddy long leg spider
the one that bit peter Parker
# i don,t know i just fond a red spider with a black butt and black tips on feet and black fangs let me know if you find out
This is probably a Red-Backed Jumping Spider. The male has a black body with a bright red abdomen. The female is the same, but the red abdomen has a black stripe. They're found all over the United States. If you want pictures of them, you can find them online at http://kaweahoaks.com/html/spi_phidippus_johnsoni.html.
A black widow
It may be a Black Widow spider. They are very poisonous and it is probably best not to approach it if you are unsure of the species. Black spiders have a distinctive red "hourglass" shape on its back.
Black Widow spiders are native to tropical climates and are poisonous. They have a mostly black body with a large red spot.
# i don,t know i just fond a red spider with a black butt and black tips on feet and black fangs let me know if you find out
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.
i think a black widow
If its black, has a large butt and there's a red shape on its back the resembles an hourglass, then its a black widow spider and they are very poisonous
This is probably a Red-Backed Jumping Spider. The male has a black body with a bright red abdomen. The female is the same, but the red abdomen has a black stripe. They're found all over the United States. If you want pictures of them, you can find them online at http://kaweahoaks.com/html/spi_phidippus_johnsoni.html.
There are a number of different spiders that could be described as black spiders with a red dot on their back including the Black Widow, the Australian Redback spider and the Jumping Spider.
A black widow
It may be a Black Widow spider. They are very poisonous and it is probably best not to approach it if you are unsure of the species. Black spiders have a distinctive red "hourglass" shape on its back.
A smashed one!
http://en.wikipedia.org/wiki/Redback_spider
An entamologist would have to see it to give you an id. Part of it is counting it's eyes.
A ladybird spider is a spider whose red body has four black dots.Specifically, the spider in question can be found natively in Greece. It carries the scientific names Eresus cinnaberinus and E. sandaliatus. It has white-striped black legs. Its fused head and thorax (prosoma) is black. Its abdomen-like rear (opisthosoma) is red, with 4 black dots.