Sentence:  ...three insectivorous fledgelings, who no sooner have they swallowed a mosquito whole are they clamoring for the whole swarm, who no sooner have they swallowed a worm than are they clamoring for an <WSD>acreful</WSD>, reminding us not a little already in certain respects of our Palafox, their presumptive father. 
Meaning of the word marked with <WSD> tags:  As much as an acre produces or uses.