You've found the famous Dave's Garden website! Join this friendly global community that shares tips and ideas for home and gardens, along with seeds and plants!
Check out the DG homepage for a brief overview of what you'll find in this gardening mega-site.
Login
If you don't have an account yet, visit the registration page to sign up.
This is indeed in the family Tachinidae, all of which are parasitic on other arthropods. Although this does resemble those in the genus Leschenaultia (see http://tinyurl.com/ylermq5 for an example), I would be very hesitant to put a specific name on it.