54 PROCEEDINGS OF THE ACADEMY OF [Feb., 



the dorsal lialf of the prozona shining blackish, a narrow continuation 

 of this bar on the angle of the metazona being dull blackish, ventral 

 portion of the prozonal lobes creamy buff against the blackish changing 

 to the general color along the ventral margin and on the metazona. 

 Tegmina broccoli brown with a strong steel-bluish tinge in the male; 

 the ventral margin in both sexes narrowly marked with blackish and 

 the minute interspaces between the veins showing up darker than the 

 veins themselves ; apical margin faintly ( o^ ) or distinctly (?) margined 

 with buffy. Abdomen with the proximal segments marked with black 

 dorsad, the remaining segments and the ventral surface chiefly maize 

 yellow. Caudal femora with the ventral aspect and the ventral por- 

 tion of the faces yellow, the dorsal section of the lateral face washed 

 with pale olive-green, the dorsal face and the dorsal section of the 

 internal face with a median and premedian bar of raw umber, 

 genicular arches seal brown, a moderately well defined pregenicular 

 annulus yellow, genicular lobes with a black basal spot, the remainder 

 yellowish dorsad, greenish blue vent rad ; caudal femora bottle green, 

 the spines black, pale at their bases. 



Measurements. 



Length of body, . 17.3 mm. 26.5 mm. 



Length of pronotum, 5 " 6.3 " 



Length of teamen, 4.5 " 5 " 



Length of caudal femur, ILT '' 14.2 " 



In addition to the types a series of eleven topotypic specimens have 

 been examined, two males and nine females (date identical with 

 types). From these specimens it is evident that the species varies 

 considerably in size, and apparently in both sexes, although the male 

 material is necessarily not as conclusive as the female. In coloration 

 the variation is chiefiy in the brilliancy of the yellow areas and of the 

 yellow values, the base color varying in the same ratio as the pure 

 yellows. In several specimens the color of the dorsal section of the 

 lateral faces of the caudal femora strongly encroaches on or suffuses 

 the ventral section, and this is apparent!}' irrespective of the strength 

 of the yellow colors. In one female the whole of the lateral lobes 

 except the blackish area is uniform cream-buff. 



Melanoplus flavidus Scudder. 



Carr Canyon, Huachuca Mountains, August, 1905 (Skinner), 1 9 . 

 October 8, 16-17, 20, 1905 (Biederman), 4 9 . Palmerlee. August 7, 

 1905 (Schaeffer), 1 9 . 



