154 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



PART XL THE FEMUR-NIGRUM GROUP OF THE GENUS 

 MELANOPLUS (Supplement) 



I revised this group in 1935, establishing the synonymy and 

 giving the known distribution of the species. A distinct new 

 species, pinaleno, is here described which shows close relation- 

 ship to magdalenae Hebard. 



The following key is given merely as a guide to distinguish 

 the males of the species, (there numbered according to their 

 proper sequence), for the variation occurring in many of the 

 characters which distinguish them prevents the proper presenta- 

 tion of such characters in anything but a detailed discussion. 



1. Cercus variously widened distad. Caudal margin of pronotum weakly 



to distinctly rounded obtuse-angulate produced 2 



Cercus narrowing to apex. Caudal margin of pronotum nearly to defi- 

 nitely truncate 5 



2. Cercus with distal portion expanded into a rounded, regular, spatulation 



which is vertical and not bent inward 3 



Cercus with distal portion less regularly expanded and bent inward 

 distad. (Subgenital plate normal, very bluntly and broadly binodose 

 at apex, these nodes sometimes fusing. Caudal tibiae glaucous in 

 males, glaucous or pink in females.) 4 



3. Cercus broad and short, its large distal spatulate portion subquadrate 



with distal margin truncate. Penis distinctive. Subgenital plate weakly 

 produced in a blunt tubercle at apex. Caudal tibiae pink in both 

 sexes. White and Sacramento Mountains, New Mexico. 



1. calidus Scudder 

 Cercus slender and elongate, its much smaller distal spatulate portion 

 well rounded. Penis distinctive but more of the type of that of the 

 following members of the group in having the apical projections elon- 

 gate and intricately developed. Subgenital plate quite strongly pro- 

 duced in a blunt tubercle at apex. Caudal tibiae glaucous in both 

 sexes. Chiricahua Mountains, Arizona 2. chiricahuae Hebard 



4. Supra-anal plate more simple, narrower with lateral margins not show- 



ing concavity meso-distad. Cercus with irregular distal portion quite 

 sharply inbent, that lamellation narrowing slightly to its moderately 

 oblique distal margin. Arizona plateau and mountains from south rim 

 of Grand Canyon south to Dewey and the vicinity of Prescott. 



3. jemur-nigrwm Scudder 

 Supra-anal plate more specialized, broader with lateral margins concave 

 meso-distad. Cercus with more irregular distal portion less strongly 

 inbent, the lamellate distal portion elongate and appearing faintly 

 trilobate. Magdalena Mountains, New Mexico; White Mountains 

 and adjacent plateau, Arizona 4. snowii Scudder 



