We present a genome assembly from an individual male Pherbina coryleti (snail-killing fly; Arthropoda; Insecta; Diptera; Sciomyzidae). The genome sequence is 863 megabases in span. Most of the assembly is scaffolded into six chromosomal pseudomolecules, including the assembled X sex chromosome. The mitochondrial genome has also been assembled and is 20.9 kilobases in length. Gene annotation of this assembly on Ensembl identified 32,619 protein coding genes.