MORGAN HEBARD 49 



NEW GENERA AND SPECIES ON MELANOPLI FOUND 

 WITHIN THE UNITED STATES AND CANADA 



(ORTHOPTERA; ACRIDIDAE) 



BY MORGAN HEBARD 



Part IV 



Over a year ago, the third part of the present series of papers 

 appeared. 1 Since that time our study of the North American 

 Melanopli has made some progress, the manuscript having been 

 prepared as far as the genus Aeoloplus. Press of work on exotic 

 material has prohibited a more rapid advance, however, and for 

 this reason we believe it best to describe, at the present time, 

 the four additional new species and two geographic races which 

 have been encountered. 



Among these the distinctive Bradynotes chilcotinae is of partic 

 ular interest. Added to the very large series of specimens 

 available for study, the valuable information on this insect 

 furnished by Mr. E. R. Buckell requires our very cordial thanks 

 to that gentleman for such kind and thorough cooperation. 



The discovery, by Dr. Witmer Stone, of another species of 

 Melanoplus in the isolated Canadian Zone of the Chiricahua 

 Mountains of Arizona, shows again the necessity for further 

 careful work in such environment on all of the higher ranges 

 of the Southwest. 



A total of five hundred and seventy-three specimens are here 

 recorded. In the present series of papers to date, a total of two 

 genera, thirty-eight species and six geographic races have been 

 described. 



As is our custom, the location of all the material is indicated 

 excepting that collected by Rehn and Hebard. This material 

 is at present all in the Philadelphia Collections. 

 Agroecotettix modestus aristus new subspecies (Plate II, figs. 1, 2 and 3.) 



Compared with the female type of A. modestus modestus 

 Bruner, described from Lerdo, Durango, Mexico, females 



1 Trans. Am. Ent. Soc, xlvi, pp. 355 to 403, (1920). 



TRANS. AM. ENT. SOC, XLVIII. 



