Not quite.
Firstly, there's an "x" for weight. I'd guess about 200 lbs. A large Komodo Dragon is ~150 lbs but a scythetail has a larger body in proportion to its tail, so I imagine it's heavier.
Secondly, there's a few typos:
...Females raise the scythetail young in an insolated isolated cavern, though most die in their early stages.
A scythetail is about 7 feet long, 3 feet of which is tail. It weighs x 200 pounds. Although quadrupedel quadrupedal, it is capable of walking on its hind legs.
***
Improved Grab (Ex): To use this ability, a scythetailmust scythetail must hit...
Thirdly, the combat entry says Scythetails "will follow prey tirelessly for days while waiting for an advantage with which to strike" but these creatures have no means to follow a trail. I suggest giving them Scent, Track as a bonus feat, and the wolflike "+4 racial bonus on Survival checks to track by scent" ability.
Fourthly, it's ineligible for Multiattack as it only has 2 attacks - maybe make it Multiattack (B) and Track?
Fifthly, where are its skills?