338 STUDIES IN THE ISCHNOPTERITES (oRTHOPTERA) 



The species treated in the present paper are the following: 



PAGE 



Ischnoptera morio Burmeister 340 



Ischrioptera atrata new species 341 



Ischnoptera angustifrons new species 343 



Ischnoptera vulpina new species 344 



Ischnoptera. rufa rufa (De Geer) 346 



Ischnoptera rufa debilis new subspecies 350 



Ischnoptera rufa occidentalis Saussure 352 



Symploce lita new species 357 



Symploce jamaicana (Rehn) 359 



Sytnploce capitata (Saussure) 361 



Symploce morsei new species 365 



Symploce flagellata new species 367 



Symploce bicolor (Beauvois) 369 



Xestoblatta nyctiboroides (Rehn) 373 



Xestcblaita carrikeri new species 374 



Xestoblatta festae (Griffini) 376 



The number of specimens recorded is 179. Of these 117 are 

 in the Philadelphia collections; the others have been most kindly- 

 loaned by the curators of the United States National Museum, 

 American Museum of Natural History, Museum of Comparative 

 Zoology and University of Kansas Collections and by Dr. Albert 

 P. Morse. In return for the determinations, a share of the dupli- 

 cate material has been retained for the author's collection. 



The Porto Rican material was secured in connection with the 

 New York Academy-Porto Rico Survey. The first set of this 

 is in every case the property of the American Museum of Natural 

 History. 



ISCHNOPTERA Burmeister 

 (Plate XVI, fig. 3, A; Plate XVII, figs. 1, 2 and 3.) 



1838. Ischnoptera Burmeister, Handb. Ent., ii, abth. ii, pt. I, p. 500. 



The genus was based on four species, three of which were at 

 that time described, while an additional species was doubtfully 

 included. 



We here restrict the genus to the forms showing the features 

 given below, which we are able to ascertain from a specimen of 

 the type species before us; other species, which have been gen- 

 erally referred to Ischnoptera, but which do not agree in various 



