The spider you are referring to is likely the yellow sac spider. Yellow sac spiders are brown with two yellow stripes on their back and are commonly found in California. They are not considered aggressive towards humans but can deliver a painful bite if provoked.
A black caterpillar with yellow stripes typically has a dark body with bright yellow stripes running along its length.
The identifying feature of a brown spider with two black stripes is the presence of two distinct black stripes running down its back.
A brown spider with black stripes on its legs is characterized by its brown body color and distinct black stripes running along its legs. These stripes are a key identifying feature that sets this spider apart from others.
It is possible that you are describing a Marbled Orbweaver spider, which is black with yellow or white markings. This spider can be found in North America and is not harmful to humans. It is important to observe from a safe distance.
The distinguishing feature of a brown spider with two black stripes on its back is the presence of the two distinct black stripes running along its body.
A black spider with brown stripes has a distinctive appearance due to the contrast between its dark body color and the lighter brown stripes running across it.
Argiope aurantia is a black spider with yellow stripes. Its common names join such different physical descriptions as black and yellow garden spider, corn spider, writing spider, and zipper spider. The black and yellow garden spider generally may be considered harmless to humans.
Banana spider
The spider you are describing is likely the yellow sac spider. They are commonly found in North America and are known for their distinctive yellow markings on their bodies and legs. Yellow sac spiders are often found indoors and are not considered to be aggressive towards humans.
grass spider
The spider with two black stripes on its back is commonly known as the zebra spider.