【Objective】The Oxycarenidae belongs to Lygaeoidea, Heteroptera. Most of the Oxycarenid species feed on seeds, as pests of agriculture or forestry, usually causing substantial economic damage. This paper documents the newly-recorded species Philomyrmex insignis Sahlberg, 1848, which was collected from Habahe County, Altay Prefecture, Xinjiang. We aim to revise the current domestic Oxycarenidae groups to promote the taxonomic research progress on Oxycarenidae. 【Method】The detailed structures of the Oxycarenid specimens were observed and compared, and then the male genitalia were dissected and photographed. Composite images and measurements were obtained using V20 Zeiss Discovery and M205FA Leica stereomicroscopes and camera using Leica Application Suite software (version 4.5.0).【Result】One species was found to be different from the other recorded Oxycarenid species in China, which was collected from Habahe County, Altay Prefecture, Xinjiang. This species is macroptery. The body is almost triangular, gradually widening from the head to the end of abdomen. The dorsal surface is shining. The body length is 3.85-4.15 mm, width is 1.70-1.80 mm. Head is pointed, length approximately equal to width. Bucculae are short. Distal end of first antennal segment is nearly reaching apex of vertex. Tubercules antennifer are visible from dorsal view. Labium is reaching anterior margin of mesocoxa. Antennae and labium are blackish brown. Eyes are far away from the front edge of the pronotum. Head, anterior lobe of pronotum are blackish brown; posterior lobe of pronotum is dark brown; posterior margin of pronotum is dark claybank. Head, pronotum and scutellum have dense punctures. Hemelytra are dark and broad, distal margin of corium is distinctly concave. Corial veins are the same colour as background and inconspicuously carinate. Clavus has three clear rows of punctures. Length of membrane is surpassing apex of abdomen. Membrane is blackish brown with light brown base line near corium. Two outer veins are of membrane bifurcate. Ostiolar peritreme of metathoracic scent gland is pale yellow, well developed, protruding. Fore femora is without or with only one distinct spine. Most parts of femora are dark brown except base and apex ochraceous. Tibiae are ochraceous. Tarsi are ochraceous except last segment dark brown. Claws are black. Lateral margins of sternites are blackish brown, and middle parts of sternites are reddish brown. Posterior margin of pygophore and cuplike sclerite are fused together; distal margin of cuplike sclerite possesses a deep gap. Dorsal lobe of paramere is large and rounded; vental lobe of paramere is very small and pointed; blade of paramere bent right-angled with basal part of paramere.【Conclusion】The monotypic genus Philomyrmex Sahlberg, 1848 is newly recorded from China. The newly recorded species Philomyrmex insignis Sahlberg, 1848 is redescribed in detail and images of habitus and male genitalia are provided too.