Poplar Petiole Gall Aphid, Pemphigus populicaulis

San Joaquin Wildlife Sanctuary, Orange County, CA. 7/19/09. © 2009 Elliotte Rusty Harold	Poplar Petiole Gall Aphid Pemphigus populicaulis Hemiptera: Aphididae Back to Hemiptera index page Back to Arthropods of Orange County, California Back to Natural History of Orange County, California
San Joaquin Wildlife Sanctuary, Orange County, CA. 7/19/09. © 2009 Elliotte Rusty Harold	San Joaquin Wildlife Sanctuary, Orange County, CA. 7/19/09. © 2009 Elliotte Rusty Harold
San Joaquin Wildlife Sanctuary, Orange County, CA. 7/19/09. © 2009 Elliotte Rusty Harold
Petiole gall on Fremont Cottonwood, Populus fremontii. San Joaquin Wildlife Sanctuary, Orange County, CA. 8/2/12. © Peter J. Bryant	In petiole gall on Fremont Cottonwood, Populus fremontii. San Joaquin Wildlife Sanctuary, Orange County, CA. 8/2/12. © Peter J. Bryant
Fundatrix? In petiole gall on Fremont Cottonwood, Populus fremontii. San Joaquin Wildlife Sanctuary, Orange County, CA. 8/2/12. © Peter J. Bryant	Winged adult. In petiole gall on Fremont Cottonwood, Populus fremontii. San Joaquin Wildlife Sanctuary, Orange County, CA. 8/2/12. © Peter J. Bryant