Key to Leeuwenia species from Taiwan

1. Fore tibiae brown with distal half yellow, mid and hind tibiae brown with distal 1/4 yellow; tergites II–VII laterally with more than 10 accessary setae......................................................................... taiwanensis

- Fore tibiae yellow, mid and hind tibiae brown with distal half yellow; tergites II–VII laterally with less than 5 accessary setae ................................................................................................... 2

2. Pronotal am setae well-developed, almost as long as pa setae; tube length 3.5–4 times as long as head........... pugnatrix

- Pronotal am setae minute, shorter than pa setae; tube length less than 2.5 times as long as head................... pasanii