^OLOPLTJS.-— MELANOPLUS. 317 



6. JSoloplus arizonensis, Scudd. 



JEoloplus arizonensis, Scudd. Proc. U.S. Nat. Mus. xx. p. 78, t. 6. fig. 3 (1897) \ 



Hah. Noeth Ameeica, Mohave Desert and Fort Whipple, Arizona \ Tucson 

 {coll. L. Bruner). 



7. iEoloplllS OCulatUS, Scudd. 



^oloplus oculatus, Scudd. Proc. U.S. Nat. Mus. xx. p. 79, t. 6. fig. 4 (1897) \ 



Hah. North Ameeica, Mohave Desert and Mohave, Arizona (coll. L. Bruner). 



Probably the only reason for not having records for this and several of the 

 preceding species from Mexican territory is because there are no collections available 

 from that region. 



MELANOPLUS, Stal. 

 Acridium, auct. in part. 



Gryllus, auct. in part. 



Caloptenus, auct. in part. 



Pezotetlix, auct. in part. 



Melanoplus, Stal, Eecens. Orthopt. i. p. 79 (1873) ; Scudd. Proc. U.S. Nat. Mus. xx. pp. 13, 120 



(1897), &c. 



Melanoplus is by far the most extensive genus of American locusts or short-horned 

 grasshoppers, since it contains upwards of one hundred and fifty so-called species. 

 The group seems to be confined to the North- American continent, where the different 

 representatives are generally distributed, although the species seem to be most 

 abundant in the temperate zone and in mountainous regions. With but few excep- 

 tions, they are frequenters of grassy glades rather than denizens of the forests or 

 tree-covered areas. The species vary much among themselves with reference to size, 

 colour, wing-length, &c. They are best separated by the male-characters, i. e. by the 

 form of the supra-anal plate, the last ventral segment of the abdomen, and the cerci. 

 Some of them are very widely distributed, while others are much restricted, and 

 several are to be classed among the pests of the country, while two or three are 

 decidedly migratory in habit. The genus has been carefully monographed by 

 Samuel H. Scudder, hence will receive but passing notice here — a mere list with 

 habitat of such forms as belong to k< Biologia " territory being given. A single new 

 species is also described herewith. 



1. Melanoplus marculentus, Scudd. 



Pezotettix marculentus, Bruner, MS. 



Melanoplus marculentus, Scudd. Proc. U.S. Nat. Mus. xx. p. 139, t. 10. fig. 1 (1897) \ 



Hah. Mexico, numerous localities on the tablelands of the northern half of the 



country 1 (coll. L. Bruner). 



