What is Azara's (1805) No. 193 Suiriri pardo amarillo menor?

Despite being well-described, Azara's No. 193 Suiriri pardo amarillo menor has never been conclusively identified. Indeed, during the 19th Century it was usually associated with species in the genus Myiarchus, despite the cup nest description provided being incompatible with that genus. In the early 20th Century it became associated with Elaenia obscura, and that has not been seriously questioned since. However, Paraguayan populations formerly attributed to E. obscura are now known as E. sordida, a species that is rare in Paraguay and incompatible with the original description. In this paper I argue that the true identity of No. 193 is Large Elaenia E. spectabilis (Pelzeln, 1868), a common species in Paraguay, and this error of understanding is responsible for many early 20th Century Paraguayan reports of E. obscura. Azara's description predates the type description of E. spectabilis by 63 years.