I Ol / O MORGAN HEBARD 141 



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NEW GENERA AND SPECIES OF MELANOPLI FOUND 



WITHIN THE UNITED STATES (ORTHOPTERA; 



ACRIDIDAE) 



BY MORGAN HEBARD 



In the past few years the Melanopli from North America, 

 north of the Mexican boundary, in the Philadelphia collections 

 have been assembled, sorted to species and given a preliminary 

 examination by the author. In addition, a large part of the 

 historic material bearing on this group, in other American col- 

 lections, has very kindly been loaned to us for comparison and 

 study. The time for compilation of the manuscript of this study 

 has arrived, the thousands of specimens being fully arranged 

 and their relationships plotted, but active military service obliges 

 the postponement of this work for an indefinite period. It appears 

 advisable, however, to describe the new species, except those of 

 the genus Melanoplus, which do not need further study to deter- 

 mine racial values, which species will later be more elaborately 

 treated in the contemplated study. 



The sequence of the species here described is according to the 

 revised arrangement of the species from the preliminary studies 

 already completed. 1 The final study of the group will probably 

 show some changes in this order, but we do not believe these will 

 be at all drastic. It is clear that Scudder incorrectly grouped 

 many forms. 



Particular efforts have been made in all the field work by Rehn 

 and Hebard to secure as large and representative series of the 

 group as possible. This has shown that, though we are now in a 

 far better position to treat the species with scientific accuracy, 

 it is highly probable that intensive local field work, particularly 

 at high elevations in the mountains of the West, will reveal addi- 

 tional undescribed forms. 



In the present paper two new genera, ten new species and one 

 new geographic race are described. The series of these new 



1 The same system of linear arrangement is followed in the author's "Notes 

 on Mexican Melanopli," Proc. Acad. Nat. Sci. Phila., 1917, pp. 251 to 275, 

 (1917). 



TRANS. AM. ENT. SOC, XLIV. 



