Apollodōrus in Harpers Dictionary of Classical Antiquities
A Greek grammarian and historian of Athens, about B.C. 140, a pupil of Aristarchus and the Stoic Panaetius. He was a most prolific writer on grammar, mythology, geography, and history. Some of his works were written in iambic senarii-e. g. a geography, and the Chronica, a condensed enumeration of the most important data in history and literature from the fall of Troy, which he places in B.C. 1183, down to his own time-undoubtedly the most important of ancient works on the subject. Besides fragments, we have under his name a book entitled Bibliotheca, a great storehouse of mythological material from the oldest theogonies down to Theseus, and, with all its faults of arrangement and treatment, a valuable aid to our knowledge of Greek mythology. Yet there are grounds for doubting whether it is from his hand at all, or whether it is even an extract from his great work, On the Gods, in twenty-four books. A good edition is Hercher's (Berlin, 1874).
Apollodorus in Wikipedia
Apollodorus of Athens (Greek: Ἀπολλόδωρος ὁ Ἀθηναῖος; born ca. 180 BC, died after 120 BC) son of Asclepiades, was a Greek scholar and grammarian. He was a pupil of Diogenes of Babylon, Panaetius the Stoic, and the grammarian Aristarchus of Samothrace. He left, or fled, Alexandria around BC 146, most likely for Pergamum, and eventually settled in Athens.
* Chronicle (Χρονικά), a Greek history in verse from the fall of Troy in the 12th century BC to roughly BC 143 (although later it was extended as far as 109 BC), and based on previous works by Eratosthenes of Cyrene. Its dates are reckoned by its references to the archons of Athens. As most archons only held office for one year, scholars have been able to pin down the years to which Apollodorus was referring. The poem is written in comic trimeters and is dedicated to Attalus II Philadelphus.
* On the Gods (Περὶ θεῶν), a detailed history of Greek religion, heavily depended on by later writers, such as Philodemus.
* A twelve-book essay about Homer's Catalogue of Ships, also based on Eratosthenes of Cyrene and Demetrius of Scepsis, dealing with Homeric geography and how it has changed along the centuries. Strabo relied greatly on this for books 8 through 10 of his own Geographica.
* Other possible works include an early etymology (possibly the earliest by an Alexandrian writer), and analyses of the poets Epicharmus of Kos and Sophron.
* Apollodorus produced numerous other critical and grammatical writings, which have not survived.
* His eminence as a scholar gave rise to several imitations, forgeries and misattributions. The encyclopedia of Greek mythology called Bibliotheca, or Library, was traditionally attributed to him, but it cannot be his; it cites authors who wrote centuries later. Today the author of the Bibliotheca is called Pseudo-Apollodorus.