Cryptophyllaspis liquidambaris
Acer rubrum [sic--likely a mistake?]
Pouch-like leaf swellings, diameter 1/12 inch, scale insect, summer
”- EP Felt: (1940) Plant Galls and Gall Makers©
Reference: https://babel.hathitrust.org/cgi/pt?id=wu.89041294323&view=1up&seq=293&q1=negundinis