"Larvae form whitish blotch mines, with several larvae in the same leaf. The mines frequently merge and give the appearance of a single very large mine" (Spencer and Steyskal, 1986, via BugGuide).
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Calycomyza flavinotum blotch mines on Common Boneset in Baltimore Co., Maryland (8/11/2018). Determined by Charley Eiseman/BugGuide.
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Bill Hubick.
A Calycomyza flavinotum leaf blotch mine on Hollow Joe Pye Weed leaf in Baltimore Co., Maryland (8/11/2018).
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Bill Hubick.
A Calycomyza flavinotum leaf mine on Joe Pye Weed in Harford Co., Maryland (7/13/2018).
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Josh Emm.
Leaf mines of Calycomyza flavinotum in Baltimore City, Maryland (7/18/2013). Determined by Charley Eiseman/BugGuide.
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Thomas Wilson.
Leaf mines (from below) of Calycomyza flavinotum in Baltimore City, Maryland (7/18/2013). Determined by Charley Eiseman/BugGuide.
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Media by
Thomas Wilson.
Calycomyza flavinotum leaf mines in Joe Pye Weed in Allegany Co., Maryland (7/28/2018).
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Josh Emm.
^ abFrick, K.E. (1956). "Revision of the North American Calycomyza species north of Mexico (Phytobia: Agromyzidae: Diptera)". Annals of the Entomological Society of America. 49: 284–300, 2 pls.
^Spencer, Kenneth A. (1973). Agromyzidae (Diptera) of Economic importance Series Entomologica. Vol. 9. The Hague. D. Gld.: Dr. W. Junk bv. pp. xii + 418 p.
^Wilhelm, Gerould; Rericha, Laura (2017). Flora of the Chicago Region: A Floristic and Ecological Synthesis. Indiana Academy of Sciences.