I caught a pair of what I've keyed out as Asilella londti. (Though I should probably double check this sometime, since that was in my early days of robber fly experience.) But sharing here so there are some public images of this taxon. Lovely flies! Riley should have nice photos of them; I just took these quick shots while waiting in my tent. Note that date and locality have been adjusted for where / when the flies were caught, not imaged.

TAM_264, CRN_9950, MAIS_2011072001. Specimen in collection.