A quick search for "striped ground squirrel" turned up only one variety, the thirteen-lined ground squirrel. The animal in the photo has stripes like a chipmunk.
Look for stripes on the face: without them, it's probably a squirrel. Both ground squirrels and chipmunks have body stripes, so the face is a better indicator.
http://naturemappingfoundation.org/natmap/facts/chipmunk_vs_...
http://www.differencebetween.info/difference-between-squirre...
You're right, there's no stripes on its face. I stand corrected.
Sadly, that was my most upvoted comment in ~9.5 years on this site.
Ahh, I was about to unvote you, but now I can't bear to do it. Keep my upvote.
To my (admittedly untrained) eye, the picture looks a lot like an Indian palm squirrel (https://upload.wikimedia.org/wikipedia/commons/d/d1/Indian_P...) – which does have stripes on its back.
[1]: https://en.wikipedia.org/wiki/Ground_squirrel