For our two Dysbatus species: I see 5 black lines across the forewing: - No. 1 very jagged and usually incomplete, terminating at the apex, No. 5 incomplete and sometimes obsolete, near the base. In D. singularis: Nos. 3 and 4 are closer together than in D. stenodesma. This specimen, 4250672, has them well apart, so I think it is D. stenodesma.
I am suggesting D. singularis bacause the thin black line extending from the wingtip of the forewing is not curved and does not extend as far as almost the outer transverse line across the forewing. See'file 'Separating Dysbatus species' which accompanies MoV Part5. Also the other criteria suggested there to tme also favour D. singularis rather than Dysbatus sp. (genus)