﻿AbstractLygaeidaeis a large family ofHemiptera(Heteroptera) currently separated into three subfamilies,Ischnorhynchinae,Lygaeinae, andOrsillinae. In this research, the complete mitogenomes of the iscnorhynchinesPylorgusporrectusZheng, Zou & Hsiao, 1979 andPylorgussordidusZheng, Zou & Hsiao, 1979 were sequenced, and the phylogeny ofPylorgusand theLygaeidaewith known complete mitogenomes were examined. The mitogenomes are 15,174 bp and 15,399 bp in size, respectively, and comprised of 13 protein-coding genes (PCGs), 22 transfer RNA genes (tRNAs), two ribosomal RNA genes (rRNAs), and a control region (D-loop). Nucleotide composition is biased toward A and T, and the gene order is identical to that of the putative ancestral arrangement of insects. ElevenPCGsbegin with a typical ATN, and the remaining twoPCGsbegin with TTG (cox1andnad4l). AlltRNAshad a typical cloverleaf secondary structure, but some of them had individual base mismatches. The phylogenetic analyses based on the concatenated nucleotide sequences of the 13PCGs, using Bayesian inference and maximum likelihood, support the monophyly ofLygaeidae. The results show thatP.porrectusandP.sordidusclustered with nine otherLygaeidae. This study includes the first complete sequencing of the mitochondrial genomes of twoPylorgusspecies, which will provide important data for studying the phylogenetic position ofLygaeidaeinLygaeoideaand reconstructing the phylogenetic relationships withinPentatomomorpha.