FIGURES 18–26. Key characters Males 2. 18, 23 in Pteroptyx maipo Ballantyne, a new species of bent-winged firefly (Coleoptera: Lampyridae) from Hong Kong, and its relevance to firefly biology and conservation

FIGURES 18–26. Key characters Males 2. 18, 23 Pteroptyx truncata paratype male (Indonesia ANIC): 18 ventral abdomen; 23 ventral deflexed elytral apex. 19–21 P. gelasina paratype male (Malaysia Sabah ANIC): 19 terminal abdomen dorsal; 20, 21 elytral apices dorsal (20) and ventral (terminal emarginations of the elytra are arrowed). 22 P. macdermotti (Philippines Donsol ANIC): ventral posterior body and hind legs, MFC arrowed. 24–26 P. malaccae (24, 25 Thailand Kon Karn ANIC; 26 Nam Heng ANIC): 24 dorsal abdomen; 25 ventral abdomen; 26 ventral left hind leg.