Found on underside of quercus phellos
This is a picture of Callirhytis favosa on an oak leaf at the Montpelier House Museum in Laurel, Maryland.
Swollen bud galls? Quercus rubra. Sending three galls to Forbes lab. Last 3 pics are gall dissected by Guerin and bright orange larvae inside.
Sponge-like and very light, already disconnected from its source.
This is a picture of Pemphigus populitransversus on a poplar along the Grist Mill Trail at Patapsco Valley State Park in Catonsville, Maryland.
This is a picture of Pemphigus populitransversus along the BWI Trail in Linthicum, Maryland.