Chonala masoni, the Chumbi wall, is a species of satyrine butterfly found in Bhutan, China and north-eastern India.

The species is named the Chumbi wall after the Chumbi Valley where it was "presumed" to have been collected by a native collector and passed on to Henry John Elwes in 1881 when he visited Sikkim with Frederick DuCane Godman.

It was originally described as a species in the genus Debis.

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