Southwood, T. R. E., 1953A. The morphology and taxonomy of the genus Orthotylus Fieber (Hem. Miridae) with special reference to the British species. Transactions of the Royal Entomological Society of London 104: 415--449. (PDF not available.)
Citations for this site should read: “Schuh, R.T. 2002-2013. On-line Systematic
Catalog of Plant Bugs (Insecta: Heteroptera: Miridae).
http://research.amnh.org/pbi/catalog/”
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(PDF not available.)