Pseudolus is a Latin comedy by Plautus, originally produced in 191 BC. The title character is a slave whose master's son is in love with a girl who is to be sold to a Macedonian soldier.
The play was probably based on an unknown Greek model, and its characters feature many stock types from the New Comedy.
Pseudolus at online book stores
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Free online texts
Internet Archive: Plautus - The Little Cathaginian, Pseudolus, The Rope, translated by Paul Nixon. Loeb edition. EPUB, MOBI, PDF and TXT formats.
Loebulus: L260 - Plautus - Plautus IV: The Little Carthaginian. Pseudolus. The Rope. Loeb edition. PDF format.
Internet Archive: The Comedies of Plautus, Vol I, translated by Henry Thomas Riley. EPUB, MOBI, PDF and TXT formats.
Latin Library: Pseudolus. HTML format.
Perseus: Pseudolus. HTML and XML formats.
Wikisource: Pseudolus. HTML and other formats.
Wikipedia: Plautus - Pseudolus
Wikisource: Plautus and Terence, by William Lucas Collins (1873).
Further reading at Tom's Learning Notes
Menander - the master of the Greek New Comedy.
Theophrastus: On Characters.
Bloom's Western Canon: Pseudolus is listed.
Latin resources: Learn to read Latin texts in the original.