Accent in Νηπία

Shouldn’t the accent in ἡ νηπία be on the penultimate? Why then Perseus gives νήπια ?
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Chicago Perseus only has that form for the neuter plural, so I’m going to just attribute it to bad Tufts parsing. The Chicago site has a better parser I believe.

http://perseus.uchicago.edu/perseus-cgi/morph.pl?token=νήπια&lang=greek