Among a large number of Orthoptera taken by muyself during a trip ot the Pacific Coast by the Canadian Pacific Railway there is one species belonging to the Melanopli which I was unable to determine from Scudder's “Revision” of the group, and could not even satisfy myself as to its generic place. I therefore sent a pair to Mr. Scudder, who informed me that it was a new species of Asemoplus, but that a change would be necessary in the description of that genus as given in his “Revision of the Melanopli” in order to receive my species. I had noticed the resemblance to Asemoplus in the extremity of the male abdomen, but the total absence of tegmina and other points of dissimilarity caused my uncertainty regarding its true generic position.