Senostoma notatum: possibly the only Senostoma species able to be decisively identified from field photos - black and white; cell R5 closed before margin.
There's another tachinid (undescribed, possibly in the tribe Minthoini, subfamily Tachininae) which occurs around the same area - it looks superficially similar to this (shape, coloration, long legs), except its ~1.5 times the size, lacks the dark wing spot (seen above), and has 3 black 'stipes' along the thorax rather than 2.