88 PROCEEDINGS OF THE ACADEMY OF [April, 



and the private series of Mr. W. T. Davis and Prof. A. P. Morse 

 have furnished a great amount of important data, although the 

 greater portion of our information has been derived from our own 

 collections. The genera which have required comprehensive revis- 

 ionary study are Cariblatta, Scudderia, Amblycorypha, Neocono- 

 cephalus, Orchelimum, Conocephalus, Atlanticus, Cycloptilum, Cryp- 

 toptilum, Gryllus and Miogryllus. 



Many data have been accumulated in the course of the studies 

 here presented, which show the necessity of revisionary work in a 

 number of other genera, but, unfortunately, either material or time 

 is lacking at present to consider properly or thoroughly these groups ; 

 we have, however, given summaries of such general conclusions as 

 we have reached in these cases, the contributions being presented as 

 abstracts of detailed studies we have in preparation or contempla- 

 tion, or as accumulations of important general conclusions for the 

 use of other workers. Such contributions will be found under 

 Nomotettix,Neotettix, Tettigidea, Pardalophora, Hippiscus, Schistocerca, 

 Melanoplus, and the Group Anaxiphites with particular reference to 

 Anaxipha. 



The total number of specimens from the area under consideration 

 examined in the preparation of this paper is 14,402, representing 

 251 species and geographic races, belonging to 100 genera. Of these 

 species nine are here described as new, but a number of other new 

 forms in the recently studied genera were based on material compris- 

 ing portions of the series here recorded. In the text of this paper 

 forty specific names and that of one genus have been placed in the 

 synonymy, the completeness of the present material, with the conse- 

 quent clearer appreciation of specific variation and character con- 

 stancy, making the sinking of these names necessary. No synonymy 

 has been established without several careful checkings of the evidence. 

 Of the specimens examined, 7,294, or about one-half, were collected 

 by the authors, chiefly in July, August and September, 1911 and 

 1913. The other principal sources of material, with the number of 

 specimens examined from each, are as follows: 



Collection of W. T. Davis 1,071 



Georgia State Collection 877. 



Collection of A. P. Morse 784 



United States National Museum Collection 703 



Cornell University Collection 636 



Hebard Collection (other than Rehn and Hebard collecting) 611 



Academy of Natural Sciences of Philadelphia Collection 



(other than Rehn and Hebard collecting) 211 



