.\rK.\0\YLKIKJM K.v'l'S. 1 1 



science growing since ih<> new century was ushered in. They are 

 few in number bill rich in lore, in enlhiisi;isin and especially in a 

 willingness to help ;i fellow student when lie sends out an S. ( ). S. 

 for aid of any kind. To A. X. raudell of Hie U. S. National Mu- 

 seum at Washington, 1). <\, I am indebted i'or many favors. Long 

 a devoted student of I he group, and an especial adept in the intric- 

 acies of the knotty problems of its nomeiichil lire, lie has been espe- 

 cially kind in answering the many questions which I have asked 

 and in loaning me numerous volumes and many specimens for 

 study. W. T. Davis of New I'riL'hlon, Stalen island, X. V.. who is 

 no) only a student of ( )rthoj:lei a, but also a nat m alist of high rn 

 and inierested in all forms of living things, has aided me greatly 

 in many ways. His private collection of Orthoptera is rich not 

 only in large series of some of the scarcer forms but in numerous 

 types of the species he has described. From il he has loaned or 

 presented me examples of many rare species. He has also fur- 

 nished many notes on distribution and habits of various forms. 

 Ja.s. A. <4. Relm and Morgan Hebard of Philadelphia. Pa., have 

 loaned me numerous specimen " I or i 'itified 



Cur me many others. Since 1!MX) they have built up at the Phila- 



iphia Academy of Natural Sciences one of the largest and most 

 complete collections of Orthoptern in the world one rich in types 

 MOI only of their own description, but of oilier authors. Their 

 published monographs and other papers on Xorth American Or- 

 Hioptera are numerous and most valuable, and from them I have 

 di !\vn freely for the pages which follow. Dr. -1. 1,. Hancock of 



icago, 111., the noted authority on the Teirigidae of the world, 

 has furnished me many notes on the disirilmt ion of the grouse 

 locusts and loaned me numerous specimens of that interesting 

 group. A. P. Morse of Wellesley. Mass., has shown me many 

 favors. He has been for thirty or more years a special student of 

 Xew England Orthoptera, and has also collected extensively in 

 Hie Southern and Pacific states. His numerous types and other 

 specimens have been placed freely at my service and he has fur- 

 nished a number of notes on distribution and habits. Dr. E. M. 

 \VaIker. of the University of Toronto, the leading student of Or- 

 ihovtera in Ontario, has sent me much dava regarding the forms 

 t'oni'd in eastern Canada, and from his writings and those of 

 Piers and Morse T have gained much of the information given re- 

 garding the species found in the extreme eastern part of the terri- 

 tory covered. Dr. II. Fox of Macon, (la., who has published inter- 

 est ing ravers on the Orthoptera of Pennsylvania. Xew Jersey. In- 



