New Wisconsin State Records for Symmerus (Diptera: Ditomyiidae) and Synneuron (Diptera: Canthyloscelidae)

In Wisconsin, only a single, dubious published record for Ditomyiidae exists. New state records are presented for Symmerus (Symmerus) lautus, Symmerus (Psilosymmerus) vockerothi, and Symmerus (Psilosymmerus) sp., along with a discussion of the putitively incorrect literature record. Canthyloscelidae has not been previously recorded from the state; a single male of Synneuron decipiens is reported. The new records are associated largely with Malaise trap samples from the Kemp Natural Resources Station, Oneidea County, and Hemlock Draw (The Nature Conservancy), in the Baraboo hills of Sauk County. A single specimen of S. (S.) lautus in the research collection at the University of Wisconsin-Madison is also noted from Bayfield County. The specimens were taken from late June through early August.