 However, Dufour's gland secretion has also been discovered to contribute in such assessments of invaders and nest mates.Chemical analysis of the Dufour's gland secretion revealed that it has a very similar composition as the cuticular hydrocarbons.However, a big difference was that cuticular hydrocarbons had more linear hydrocarbons than the glands and dimethylalkanes were more prevalent in gland secretions.