Caste-specific cuticular lipids in the stingless bee Friesella schrottkyi Túlio M. Nunes, E. David Morgan, Falko P. Drijfhout and Ronaldo Zucchi Apidologie, 41 5 (2010) 579-588 Published online: 29 July 2010 DOI: 10.1051/apido/2010042