Tilia https://www.inaturalist.org/observations/51501242, frass pattern https://www.inaturalist.org/observations/51501245, Didymomyia tiliacea galls https://www.inaturalist.org/observations/51501247, rolled in leaves https://www.inaturalist.org/observations/51501254, bug https://www.inaturalist.org/observations/51501256
Beaten from Ivy (Hedera helix)
Diaea livens, male crab spider (Thomisidae), Huddart Park, San Mateo Co., CA - February 2009.