Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Mĕnălippus (orig. form Mĕlănip-pus), i, m., = Μελάνιππος, the slayer of Tydeus, who, while dying, bit the head of Menalippus, Stat. Th. 8, 719; 740.
The form Melanippus is found as the name of a tragedy of Attius, Cic. Tusc. 3, 9, 20.