Cnephaeus gobiensis
Habitat
Deserts, semi-deserts and mountains; roosts alone or in small groups in shade, rock crevices, old buildings or cave edges, not trees
Range
Central Asia, including northern India, Afghanistan, China, Mongolia, Pakistan, Russia, Kazakhstan and northern Iran
Size
Body 57-65mm; forearm 38-42mm
The Gobi serotine, the Gobi big brown bat, Eptesicus gobiensis (now Cnephaeus gobiensis), has reddish-yellow back fur with dark brown hair bases and brownish-white underparts. Body length is 57 to 65mm and the forearm 38 to 42mm. Bobrinski described it in 1926 (Wikipedia, general species account).
It lives in deserts, semi-deserts and mountains, roosting alone or in small groups in shade, rock crevices, old buildings or the edges of caves rather than in trees, and is an insect-eater, possibly including butterflies. The range runs across Central Asia, including northern India. The source gives no India-specific detail (Wikipedia, general species account).