Hemaris thetis (Taxonomy)
Synonymized with Haemorrhagia diffinis as a subspecies by Rothschild & Jordan, 1903, Novit. zool. 9 (suppl.): 449. Treated by Draudt, 1931, in Seitz (ed.), Die Gross-Schmett. Erde 6: 881, as a form of Haemorrhagia diffinis ariadne Hodges, 1971, in Dominick et al. Moths Amer. N. of Mexico 21: 117, downgraded thetis to a form of Hemaris diffinis. Treated as a subspecies of Hemaris diffinis by Bridges, 1993, Cat. Fam. Gen. Spec. Sphingidae of the World: VIII.9. Resynonymized with the nominotypical subspecies by Kitching & Cadiou, 2000, Hawkmoths of the world: 47. Reinstated as a species by Schmidt, 2009, J. Lepid. Soc. 63: 102.
Very similar to Hemaris diffinis, differing in the underside of the thorax and abdomen being entirely yellow except for the anal tuft.
Male genitalia identical to those of Hemaris diffinis.
Ductus bursae slightly broader than in Hemaris diffinis.