The complete mitochondrial genome of <i>Psyllaephagus populi</i> (Hymenoptera: Encyrtidae)

<i>Psyllaephagus</i> wasps are key agents in integrated pest management. Here, we sequence and characterize the complete mitochondrial genome of <i>Psyllaephagus populi</i> Trjapitzin 1964 (Hymenoptera: Encyrtidae). The 16,889-bp mitochondrial genome encodes 13 protein-coding genes (PCGs), 22 tRNA genes, two rRNA genes, and an AT-rich control region. Nucleotide composition is strongly A + T biased (82.01%), with individual proportions of A (46.86%), T (35.15%), C (11.72%), and G (6.27%). Maximum-likelihood phylogeny using all 13 PCGs places <i>Psyllaephagus</i> in close association with <i>Blastothrix</i>. This mitogenome enriches Encyrtidae genomic resources and improves resolution of intra-family phylogenetic relationships.