These were small slightly flattened trumpet-shaped lerps spotted on eucalyptus leaves. The broader part of these lerps were transparent and appeared fragile. Each of these lerps appeared to have a nymph inside with their pale orange bodies clearly visible through the transparent lerp shell.
Unlike lerps of Glycaspis species, I could not see any ants crawling around these lerps. I assume therefore that these lerps are not made of the same material as the Glycaspis species. Also, this species of Creiis lerps seemed keratinous. Various birds feed on lerps but a study on lerp-feeding by birds suggests that birds avoided the Creiis species of lerps.
Spotted on Mugga Ironbark (Eucalyptus sideroxylon) in the Cocoparra National Park, New South Wales
(Please add Creiis corniculatus (Eastern Horn Lerp). Thanks)