MCNEILL REVISION OF THE TRUXALIN^ OF NORTH AMERICA. I 79 REVISION OF THE TRUXALINiE OF NORTH AMERICA. (Read be/ore the Academy, November 2gth, fSgj.) BY JEROME McNEILL. It is proper to state that this paper is based largely upon the mate-rial of the United States National Museum, to whose ofificers I am much indebted for the generosity with which the collection was placed at my disposal for study during the three months which I was able to spend in Washington. For these and other favors I am deeply in-debted to Dr. C. V. Riley and Dr. L. O. Howard. Dr. S. H. Scudder has placed me under great obligations by sending me many of the rare and sometimes uni(iue specimens of his less-known species. I have also received help in the way of types and other specimens, as well as valuable 'notes, from Prof. R. S. Morse, which I gratefully acknowl-edge. I am indebted to the kindness of Mr. Coquillett for valuable notes on his very interesting collection of Orthoptera made in Southern California and now included in the collection of the National Museum. Finally, I owe to the generosity of Mr. Ashmead the possession of a small but valuable collection of Orthoptera from Florida. My own collection of Orthoptera contains all the species of the Truxalince found west of the AUeghenies, east of the great plains, and north of Texas and Florida and a large portion of the other species of North America outside of Mexico and Central America. I regret ex-tremely that I have not been able to see more of the Mexican species of Saussure and Walker, but the types are not easily accessible and without them the often meagre descriptions are insufficient for the cer-tain determination of their species. With the single exception of Alpha, I have not accepted the genera proposed by Brunner in his ex-cellent Revision du. Systlme des Orthopteres. The brief descri ptions given in his key and the failure to name the species (except in the case noted above) upon which his genera were founded, together with the fact that many Mexican forms were unknown to him, have made it impos-sible to satifactorily identify these genera. The Truxalince constitute a sub-family of Acrididce. They are more closely related to CEdipodince than to any other group of equal rank.