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MORGAN HEBARD ^v,^^' '• S3J. 



STUDIES IN THE GROUP ISCHNOPTERITES 

 (ORTHOPTERA, BLATTIDAE, PSEUDOMOPINAE) 



BY MORGAN HEBARD 



In studying the Blattidae of North America north oi Mexico 

 and material of the family adventive in that region, it has been 

 found necessary to treat fully a number of tropical American 

 species, in order to clarify the proper relationships of the North 

 American forms and in some cases to determine their correct 

 nomenclatorial status. 



The present paper treats those forms involved, found in the 

 Group Ischnopterites, and is the seventh and last of this series of 

 supplementary studies which have appeared in two publications.^ 



The Group Ischnopterites, like the Group Blattellites, is ex- 

 tremely large, comprehending a vast array of species. Among 

 these, the number which should be referred to the genus Isch- 

 noptera is very great, but many species which have been placed 

 there belong properly to distinct genera. One of these, 

 Syniploce, here described, is represented in the United States by a 

 single species, but to determine the characters of importance, 

 both generic and specific, we have here fully treated all of the 

 species represented in the series before us. The same is true of 

 the genus Xestohlatta, also described in the following pages, a 

 single species of which is represented in the material before us 

 adventive to the United States. In addition, to locate the correct 

 position of the remaining species of the Group found in the United 

 States, we have considered fully the genotype of the genus 

 Ischnoptera and the forms of that genus showing nearest rela- 

 tionship, of which /. rufa occidentalis Saussure, alone, is known 

 from the United States, probably from adventive material. 



In studying the forms here treated and those found in North 

 America north of the Mexican boundary, the entire ser es of the 

 group in the Philadelphia collections has been carefully exam- 

 ned, this including over sixty exotic species, the majority of 

 which have as yet not l)cen recorded. 



1 Trans. Am. Ent. Soc, and Ent. News. 



TRANS. AM. ENT. SOC, XLII. 



