The occurrence of Hyadaphis foeniculi in North America is discussed and a list of its synonyms in the North American literature is presented. H. tataricae is redescribed and a key to separate the two is given along with comparative drawings and photo- graphs.
"Notes on Hyadaphis Foeniculi and Redescription of Hyadaphis Tataricae (Homoptera: Aphididae),"
The Great Lakes Entomologist: Vol. 17
, Article 3.
Available at: http://scholar.valpo.edu/tgle/vol17/iss2/3