KEY TO THE SPECIES OF IREPACMA FROM CHINA 1 Fore wing without spot or streak 2 – Fore wing with spots or short streak and spots 4 2 Valvae with a dorso-proximal process in male genitalia 3 – Valvae without dorso-proximal process in male genitalia; gnathos distinctively divided into two sclerotized lunate plates; sacculus forked from about basal 1/3, then forming two large processes; distal 1/4 of aedeagus with a few small spines bifida sp. n. 3 Valvae asymmetrical: left sacculus apically with two short processes, right sacculus with a small dorsal process having pointed apex, ventral process absent; juxta somewhat U-shaped abnormis sp. n. – Valvae symmetrical, sacculus with distal process long and curved, lanceolate distally; juxta elliptical lanceolata sp. n. 4 Fore wing with streak and spots 5 – Fore wing with spots only 7 5 Valvae with a dorso-proximal process 6 – Valvae without dorso-proximal process, uncus large; gnathos large and broad; valvae elongate, not obviously expanded; aedeagus divided into two subequal branches from basal 1/3 magnignatha 6 Tegumen laterally with a small process at about middle; valvae elongate; sacculus with distinct distal process hainanensis – Tegumen laterally without a process; valvae with distal part dilated; sacculus without distal process asymmetrica 7 Valvae without dorso-proximal process 8 – Valvae with a dorso-proximal process 9 8 Uncus distally dilated; gnathos rounded and spinulose; sacculus short, subtriangular, without spines distally; aedeagus divided into two parts from basal 1/3 grandis – Uncus more or less rectangular; gnathos irregularly shaped, laterally with a long process; sacculus extremely elongate, with dense spines distally; aedeagus not divided pycnocephala 9 Valvae with very small and short dorso-proximal process 10 – Valvae with large dorso-proximal process, longer than half length of costa 11 10 Uncus very small; costa without process; sacculus with distal process bent downward; aedeagus with cornuti composed of a group of short spines at about 2/3 furvimacularis – Uncus rather long; costa with a phylliform process at about middle; sacculus without distal process, but with a patch of strong spines; aedeagus without cornuti pallidia

Published as part of Wang, S. & Li, H., 2005, The Genus Irepacma (Lepidoptera: Oecophoridae) From China, Checklist, Key To The Species, And Descriptions Of New Species, pp. 125-133 in Acta Zoologica Academiae Scientiarum Hungaricae 51 (2) on pages 126-127, DOI: 10.5281/zenodo.12586397