Discovery of a peculiar insular race of (Nire, 1920) (Lepidoptera: Lycaenidae) endemic to Yinggeling Mountain of Hainan, suggesting heterogeneous geological history of mountain formation of the island.

A peculiar population of (Nire, 1920) was discovered from the Yinggeling Mountain Mass of central Hainan. Its wing pattern and COI barcode data show considerable distinction from other geographic populations of , including that of Bawangling, approximately only 40 km away and also located in Hainan. The p-distance value of the COI barcode between the Yinggeling and Bawangling populations was 1.

Notes on Halpe paupera Devyatkin, 2002 (Lepidoptera: Hesperiidae).

A series of specimens with some differences in wing patterns and male genitalia from different localities is recognized as Halpe paupera Devyatkin, 2002 by comparing the COI gene sequences. The morphological variability in male is discussed and illustrated. The intraspecific variation of the female of H.

On a New Insular Subspecies of Chrysozephyrus mushaellus (Matsumura) (Lepidoptera: Lycaenidae) Discovered from Hainan.

Chrysozephyrus mushaellus paolongkoui, ssp. nov. is described and illustrated from Hainan island of southern China.

First use of artificial canopy bridge by the world's most critically endangered primate the Hainan gibbon Nomascus hainanus.

All gibbon species (Primates: Hylobatidae) are facing high extinction risk due to habitat loss and hunting. The Hainan gibbon Nomascus hainanus is the world's most critically endangered primate, and one of the priority conservation actions identified is to establish artificial canopy corridors to reconnect fragmented forests. The effectiveness of artificial canopy bridge as a conservation tool for wild gibbons has not been widely tested, and the results are rarely published.

A new subspecies of Delias agostina Hewitson (Lepidoptera: Pieridae: Pierinae) from Hainan Island.

The taxonomic status of the population of Delias agostina on Hainan Island is clarified and previous taxonomic treatments are reviewed. The insular population is found distinctive from continental races and is described herein as, Delias agostina sushii ssp. nov.

Description of a new subspecies of Talicada nyseus (Guérin-Méneville, 1843) from Hainan, China (Lepidoptera: Lycaenidae), with notes on the genus Talicada Moore, 1881.

An insular population of Talicada nyseus was discovered from Hainan Island, representing a butterfly species unrecorded in China. Materials of this species from Hainan were compared with the races from other regions, revealing that the wing pattern is distinct from that of other subspecies, and is hereinto described as T. nyseus lami ssp.

A taxonomic note on Erionota acroleuca (Wood-Mason & de Nicéville, 1881) stat. rest. (Lepidoptera: Hesperiidae).

The purpose of this paper is to restore Erionota acroleuca (Wood-Mason & de Nicéville, 1881) as a valid name, and to establish Erionota acroleuca apicalis de Jong & Treadaway, 1992 as a new subspecific combination, with its immature biology briefly introduced.