Colias leechi is a very little known butterfly in the family Pieridae. It was described from the East Palearctic "In ramificationibus occidentalibus montium Himalayensium in valle Chonging" (17000feet altitude).[1]
Chongqing covers a large area crisscrossed by rivers and mountains. None are high enough to fit the description and Röber gives Sikkim as the locality[2] and the British Museum card gives the type locality as West Himalaya Ladak.
Described as a variety of Colias eogene. The Global Lepidoptera Names Index treats leechi as Colias staudingeri ssp. leechi. Accepted as a species by Josef Grieshuber & Gerardo Lamas [3]