Myzocallis walshii. [Distribution map].
Abstract A new distribution map is provided for Myzocallis walshii (Monell). Hemiptera: Aphididae. Host: American red oak Quercus rubra. Information is given on the geographical distribution in Europe (Andorra, Belgium, Czech Republic, France, Germany, Hungary, Italy, Poland, Portugal, Serbia, Slovakia, Slovenia, Spain, Switzerland, UK, England and Wales), North America (Canada, British Columbia, New Brunswick, Nova Scotia, Ontario, Quebec, USA, Arkansas, California, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Louisiana, Maine, Maryland, Massachusetts, Mississippi, Missouri, Montana, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, Tennessee, Virginia, Washington, Wisconsin).