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Bombus fraternus
Face and head black. Yellow thorax with black band between wings. Abdomen yellow except for last segments.
I cannot find any information that gets Bombus fervidus closer than Arkansas. Go to Bugguide.net
http://bugguide.net/node/view/6/bgimage and submit your photo. You have to register (just your email and a password) and login to submit.
I thought it looked like the Northern Golden too, but the range map made me doubt.
Your image looks more like the Bombus fervidus - Golden Northern Bumble Bee (http://bugguide.net/node/view/23135) because of the lower yellow fur on the thorax; but they are not typically in this range. You might submit the photo to Bugguide for a definitive ID
Here is anther link to the range map of various Texas Bumble Bees: http://texasbumblebees.com/species/