368 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



The pair of small but striking tubercles or short transverse 

 high lamellae mesad on the male supra-anal plate constitute a 

 feature distinguishing this species and lepidus Scudder from their 

 allies. 



The male cerci are much more extensively spatulate distad in 

 ablutus, and the two erect proximal processes of the penis are 

 ear-like and no higher than wide, whereas in lepidus they are 

 elongate and slenderly spindle-shaped. 



The Femur-nigrum Group 



To this group we refer, in the following sequence, calidus 

 Scudder, chiricahuae Hebard, femur-nigurm Scudder, snowii 

 Scudder, magdalenae here described and truncatus Scudder. 



Striking differentiation is shown by all; chiricahuae, femur- 

 nigrum and snowii are clearly nearer each other and the same is 

 true of magdalenae and truncatus. 



All have the external pagina of the caudal femora dark (except 

 in the palest examples of quadratus and truncatus) and uniformly 

 colored with a very conspicuous pale longitudinal ventral mar- 

 ginal band. The pronotum is very bluntly rounded obtuse- 

 angulate produced except in magdalenae and truncatus. The 

 tegmina are rather broad lanceolate pads with bluntly rounded 

 apices. The apex of the male abdomen is enlarged, often very 

 strongly so, with furcula very small, supra-anal plate moderately 

 broad and subgenital plate with dorso-distal margin distinctly 

 convex produced but not showing any tendency toward tuber- 

 culation except in magdalenae. The penis is of very dissimilar 

 character in quadratus, femur-nigrum and its nearest allies, 

 magdalenae and truncatus. 



Melanoplus calidus Scudder (PL XXIV, fig. 6) 



1899. Melanoplus calidus Scudder, Proc. Davenport Acad. Nat. Sci., vn, 



p. 203. [o*, 9; 12 Gilman's Ranch, Eagle Creek, White Mountains, 



New Mexico, at 7000 feet.] 

 1902. Melanoplus quadratus Scudder, Proc. Davenport Acad. Nat. Sci., ix, 



p. 49. [ d% 9 ; South Fork of Eagle Creek, White Mountains, New Mexico, 



at 8100 feet.] 

 1909. Melanoplus calidus Rehn and Hebard, Proc. Acad. Nat. Sci. Phila., 



1909, p. 165, text figs. 15 and 16. [d\ 9; Cloudcroft, [Sacramento 



Mountains], New Mexico, at 8600 to 8700 feet.] 



12 These and specimens from the South Fork of Eagle Creek were recorded 

 by Scudder and Cockerell as calidus in 1902. 



