3.7mm bl. Reared from a Creosote Stem Gall. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Creosote Stem Gall Midge

Asphondylia auripila

Diptera: Cecidomyiidae

(*This species and its host plant not known from Orange County, CA)

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3.7mm bl. Reared from a Creosote Stem Gall. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

3.7mm bl. Reared from a Creosote Stem Gall. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Creosote Stem Gall, younger; 3.2cm diam. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Creosote Stem Gall, older; 3.2cm diam. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Presumed inducer larva (red star) inside one of the component galls of the polythalamous Creosote Stem Gall; An intact component gall to the right. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Presumed inducer larva inside one of the component galls of the polythalamous Creosote Stem Gall. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Exuvium (pupal case) from the presumed inducer showing on the surface of the polythalamous Creosote Stem Gall. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.

Exuvium (pupal case) from the presumed inducer showing on the surface of the polythalamous Creosote Stem Gall. Fish Creek Wash, Anza Borrego Springs, San Diego County, CA. © Peter J. Bryant.