1	Elytral rudiments clearly extending beyond pronotum in width	2
–	Elytral rudiments short, not or slightly extending beyond pronotum in width	4
2	Elytral rudiments broad, lobe-like, extending posterolaterally and covering part of metanotum	3
–	Elytral rudiments narrow, sword-like, extending laterally and not covering any part of metanotum	Pyrocoelia sanguiniventer Olivier
3	Elytral rudiments longer than broad by 1.5 times; mesoscutellum about as broad as long; pronotal windows ambiguous	Pyrocoelia analis (F.)
–	Elytral rudiments longer than broad by 3 times; mesoscutellum transverse; pronotal windows clear	Pyrocoelia praetexta Olivier
4	Abdomen without morphologically recognizable photogenic organs; metanotum milky white; pronotum semicircular, translucent gray in explanate area	Pyrocoelia formosana Olivier
–	Abdomen with a pair of photogenic organs on sternite 8; metanotum bronze; pronotum more-or-less projecting forward, dark in margins and central carina between windows	Pyrocoelia prolongata Jeng & Lai