THE ORTHOPTERAN GROUP SCUDDERI^. 

 By Samuel H. Scudder. 



Presented June 9, 1897.* 



The Scudderiae are Phaneropterine Locustarians in which the fas- 

 tigium of the vertex is slightly deflexed, acumiuate or subacuminate, no 

 broader than the first antennal joint, the prouotum plane above and in 

 no way sellate, the fore coxae armed with a spine, the fore tibiae sulcate 

 above with acute margins and the genicular lobes of the hind femora 

 blunt, armed only with a feeble spine or spines. 



There are but three genera in this strictly American f group, the one 

 here added easily distinguished from the others by the unusual breadth 

 of the front of the fastigium of the vertex, and represented by a single 

 species found in California. One of the other genera also has but a 

 single species in North America, but unlike the others is represented 

 elsewhere. Only the North American forms are considered in this 

 paper. The third genus, from which the group takes its name, is more 

 abundant in species, two of which are described here for the first time, 

 while the somewhat tangled synonymy indicates in what confusion the 

 names have been employed. These three genera may be distinguished 

 by the following table : — 



Table of the genera of Scudder ice. 



a} . Fastigium of vertex between the antennjs less than half the width of 

 the basal antennal joint; mesosteruum not more than half as broad again 

 as long ; tegmina and wings of unequal length, both surpassing the hind 

 femora ; tegmina four or more than four times as long as broad, the 

 tympanum of male twice as long as broad, with nearly straight sides and 

 crossed by a single stout vein ; genicular lobes of hind femora armed at 

 apex with a single distinct but not very long spine. 



* Subsequently rewritten. 



t One species is credited to Africa, but it may be doubted whether it strictly 

 belongs here. 



