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Published online by Cambridge University Press: 31 May 2012
Recently I received from Mr. J. Sperry a srnall series of a Thraulodes species from Arizona which, while apparently very closely allied to speciosus Trav. in genitalia, as far as can be told from the rather crude figure (Biol. of Mayflies, 553, fig. 146), does not fit in with Traver's description in several points. I am treating it therefore as undescribed.
Contribution No. 2162, Division of Entomology, Science Service, Department of Agriculture, Ottawa.