MORGAN HEBARD 257 



NEW GENERA AND SPECIES OF MELANOPLI FOUND 



WITHIN THE UNITED STATES (ORTHOPTERA; 



ACRIDIDAE) 



BY MORGAN HEBARD 



Part II 



This is the second of a series of papers on undescribed Mel- 

 anoph found in the United States. It was originally intended 

 to include in the first paper, published in June, 1918,^ all of the 

 new forms found in the Philadelphia Collections, except those of 

 the genus Melanoplus, but active duty in the Army prevented 

 completion of the work to that point. Two new genera, ten new 

 species and one new geographic race were there described. In 

 the present paper twelve new species and one new geographic 

 race are described, carrying this work through the first group of 

 the genus Melanoplus with two eastern species in addition. 



As in the first paper, the sequence of species described is in 

 accordance with the revised arrangement of the species, from the 

 preliminary studies already completed for the North American 

 Melanopli." Scudder's grouping of many of the forms has been 

 found incorrect, and, particularly in the genus Melanoplus, his 

 "Series" are in so many cases composed of widely separated 

 species, that we have been obliged to institute a very different 

 arrangement and have decided to rearrange the species into 

 units which we have given "Group" designation. It should, 

 therefore, be borne in mind that our Groups do not in any way 

 correspond to Scudder's "Series." 



1 Trans. Am. Ent. Soc, xliv, pp. 141 to 169. 



2 We would note that our monotypic genus Argiacris, described in our first 

 paper, comes between Asenioplus and Bradynotes. This genus was there 

 described, in order to be able to make known one of the most distinctive units 

 found among the undescribed forms at hand. One of our statements concern- 

 ing this genus is, in part, incorrect. It is not distinguished from Podisma 

 by the produced caudal margin of thepronotum, for in Podisma, as in Melano- 

 ])his, some of the groups are comprised of species which have the caudal 

 margin of the pronotum angulate produceil, while otiiers have it weakly 

 emarginate to different degrees. 



TRAXS. .\M. ENT. SOC, XLV. 



