We present a genome assembly from an individual female Lobophora halterata (the Seraphim; Arthropoda; Insecta; Lepidoptera; Geometridae). The genome sequence is 315 megabases in span. The complete assembly is scaffolded into 32 chromosomal pseudomolecules with the Z and W sex chromosomes assembled. The mitochondrial genome has also been assembled and is 15.7 kilobases in length.