Scudder.] 



282 



[January 23, 



Calliptenus and Melanoplus are pointed out, that the change of names 

 which it will necessitate may not appear to those unacquainted with 

 the scholarly work of Stal to be capricious. For better comparison 

 the differences are presented in a tabular form. 



Calliptenus. 



Eyes proportionately larger in d 

 than in ? ; in the former broader than 

 the length of the genas. 



Upper base of antenna opposite the 

 middle of the eye. 



Deflected lobes of pronotum abruptly 

 separated from the dorsal area by a 

 distinctly elevated carina. 



Meso- and matasternum together 

 equally long and broad. 



Metasternal lobes almost transverse, 

 more widely separated than in Melan- 

 oplus, the posterior edge convex 

 throughout. 



Mediastinal vein of tegmina striking 

 the costa at the middle of the outer 

 two-thirds of the wing. 



Discoidal cell of same terminating in 

 the middle of the wing. 



Vena intercalate/, of same wanting. 



Branches of the principal veins much 

 less numerous than in Melanoplus at 

 the tip of the tegmina; they are also 

 more oblique, and have a normal dis- 

 tribution. 



Hind femora broad and stout, the 

 upper margin serrate. 



First joint of hind tarsi longer and 

 very much stouter than the last joint; 

 arolium small. 



Penultimate segment of c? abdomen 

 not noticeably larger than the preced- 

 ing, leaving the abdomen horizontal. 



Melanoplus. 

 subequal in $ and ? ; in both gener- 

 ally narrower, never broader, than the 

 length of gena3. 



slightly below the middle of the eye. 



passing almost insensibly into the dor- 

 sal area, there being no distinct lateral 

 carinse. 

 together longer than broad. 



oblique, directed backward as much 

 as inward, the posterior edge more or 

 less excavated next the hind coxa?. 



striking the costa beyond the middle 

 of the outer half of the wing. 



terminating beyond the middle of the 

 wing. 



distinctly present. 



running parallel with the principal 

 veins, and remaining in close proxim- 

 ity to them throughout the tegmina, 

 making the framework of the wing 

 appear as if formed of an excessive 

 number of principal veins, and adding 

 greatly to its power in flight; they are 

 but little oblique even at the tip of the 

 wing. 



slenderer than in Calliptenus, the up- 

 per margin smooth, 

 only a little stouter than, and' of equal 

 length with, the last joint; arolium 

 large. 



much swollen and expanded on the 

 ventral surface, noticeably larger than 

 the preceding segments, throwing the 

 tip of the abdomen upward. 



