42 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



In the preparation of the keys and descriptions free use has 

 been made of various works on the Orthoptera, especially the 

 " Acrididae of New England," by Professor Morse, and the 

 " Orthoptera of Indiana," by Professor W. S. Blatchley. 



ACKNOWLEDGMENTS. 



The writer is greatly indebted to Dr. Britton for much help 

 and many suggestions throughout the preparation of this paper. 



Professor A. P. Morse has examined the material in the 

 Station collection, the records in this paper being based largely 

 upon his determinations. Professor Morse's kindness in ex- 

 amining material, loaning specimens for study, and answering 

 questions pertaining to the group, has been greatly appreciated. 



Thanks are due to Professor A. E. Verrill of Yale University, 

 through whose kindness we were able to examine the Orthoptera 

 stored in the attic of Peabody Museum ; to Professor W. S. 

 Blatchley and to Mr. Wm. Beutenmuller for records of Orthop- 

 tera taken by them in Connecticut. 



The measurements are given in millimeters, and refer to 

 the length unless otherwise stated ; thus the word " body " with 

 " 19-25 " under it means that the body from the front of the 

 head to the tip of the abdomen is from 19 to 25 millimeters in 

 length. The measurements of the Acrididce are from Morse's 

 papers, as his figures under many of the species are based upon 

 the careful measurements of several hundred specimens. 



The keys apply to Connecticut species only, and are for dis- 

 tinguishing the adults and not the nymphs. 



All figures of insects in Plates VI-XI are natural size. Figure 

 2, of Plate VI, is from the Report of the Connecticut Agricul- 

 tural Experiment Station for 1903. Figure 3 is from a photo- 

 graph kindly loaned by Professor M. V. Slingerland of Cornell 

 University. Figures i and 4, of the same plate, and the remainder 

 of the plates are from photographs by the author. 



Figures 5-15, 17-26, 28-35, 37-48, in the text, are redrawn 

 from Morse. Figures 49-52 are redrawn from Scudder. Figure 

 61 is from a drawing by W. E. Britton. All others are from 

 drawings by the author. 



