Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Asphaltītes, ae, m., = Ἀσφαλτίτης; also Asphaltites lacus, = Ἀσφαλτῖτις λίμνη, Lake Asphaltites (the Dead Sea), in Palestine, Plin. 5, 15, 15, § 71; 5, 16, 15, § 72; cf. Mann. Palaest. p. 261.