Found hundreds of these bugs clustered on the outside of my brother-in-law's house in SE Portland, Oregon in mid October. There were also some number of ladybugs around. So I thought they were the larvae of the ladybugs but browsing through ladybug pictures, they don't have enough similarities. These have longer antennae for one. Surprisingly, the bugs only clustered on my brother-in-law's house but not the neighbors'. Don't know if the stucco finish has anything to do with it (e.g. trapping heat under the sun etc). Underneath their wings, they have reddish/orange patterns on the abdomens.