Size perhaps 15-20 mm. (It was a large cranefly.) This is close to a photo identified as Tipula dorsimacula in Salsbury, Insects in Kansas, p. 379. (1) Length of that species is given as 15-25 mm. I am therefore going to file this under the (large) genus Tipula. That seems to be a relatively safe bet. The one image I see on the web identified as T. dorsimacula does not agree with Salsbury's photo, so I'm going to trust that source.

This also rather resembles Bruce Marlin's image identified as T. abdominalis.

Note added 7/20/05: Dr. Chen Young of The Carnegie Museum of Natural History has identified this as a female Tipula (Vestiplex) longiventris. Many thanks!