Location: Makunda Christian Hospital, Karimganj District, Assam
Date: 4th June 2014
Equipment: Nikon D800 with Nikkor 300mm f2.8 + 2x TC
From James L. Castner's "Amazon Insects: A Photo Guide", this seems to be genus Eumastax, but that genus is not (yet) in iNaturalist's database.
Eumastacoidea is a superfamily within the order Orthoptera. The family has a mainly tropical distribution. Some of the characters of the members of the superfamily are the lack of an abdominal tympanum, wings if present wident towards the tip, the antennae are short in some groups the hindlegs are spread out laterally at rest. The overall classification based on genitalic characters and the geographic distribution of the groups are as follows: