Morphological study of Bombus flavescens’s visual organs

List of specimens, including species, collection (CUNHM= Chulalongkorn University Natural History Museum, Bangkok, Thailand; KKIC= Kasetsart Kamphaeng Saen Insect Collection, Kasetsart University Kamphaeng Saen Campus, Nakhon Pathom, Thailand; NHMUK= Natural History Museum, London, UK; NMNL= Naturalis Biodiversity Center, Leiden, the Netherlands; PHW= Paul H. Williams research collection, UK), specimen ID, origin country and latitude group (Low= 0˚–20˚N; High= >20˚N), and measurement of intertegular distance (ID), head width (HW), median ocelli width (MOW) in millimetres (mm).