Hyles sammuti is a moth of the family Sphingidae. Kitching and Cadiou (2000) treat it as a valid species,[1] while Pittaway treats it as a subspecies of Hyles tithymali, seeing the larvae are very similar to Hyles tithymali mauretanica. Based on studies of the mitochondrial DNA, Hyles sammuti probably hybridises with Hyles euphorbiae.[2]
The wingspan is 63–75 mm. There are multiple generations per year with adults on wing from February to October.
The larvae feed on Euphorbia spinosa, Euphorbia pinea and Euphorbia dendroides.