The current analysis of the rates of development of the eggs of 48 species belonging to 8 tribes, which were kept at a range of differenttemperatures, indicates that ladybirds do not all have the same Ldt, but that the of eggs of aphidophagous Coccinellini develop fasterthan those of coccidophagous Chilocorini and more importantly those of the aphidophagous genus Scymnus and the coccidophagousNephus, both belonging to the same robust tribe, the Scymnini, also differ, with those of the latter genus developing more slowly.