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Your friend's photo does key to Tenthredomyia (=Ceriana) grahami in Shannon[1927]. More details on that species...including a quote of the 1925 original description by Shannon (seemingly based on a single female specimen)...can be found in the comments thread under this iNaturalist post.

Note that the ceriodine in your friend's photo is lacking the two small yellow spots placed laterally on the vertex described for T. grahami by Shannon...though that could conceivably be a sexually dimorphic character of the female only (I think your photo shows a male...the eyes appear as if they may be very narrowly contiguous).