374 NOKTH AMERICAN MELANOPLI (ORTHOPTERA) 



Melanoplus truncatus Scudder (PL XXV, figs. 6, 7, 8 and 9) 



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

 p. 177, pi. 7, fig. 8. [cT, 9 ; San Francisco Mountains, Arizona.] 



This insect is compared with magdalenae under the description 

 of that species. It is clearly a more highly specialized insect. 

 The distinctive penis is here figured. 



Normally rich pink, the caudal tibiae externally suffused with 

 brown on the sides proximad and distad in five males and buffy 

 with a very faint glaucous tinge in three females of the very large 

 series from the San Francisco Mountains. Such dichromatism of 

 the caudal tibiae is distinct from that found in femur-nigrum and 

 snowii. 



A moderate number of females are very dull light olivaceous 

 yellow in general coloration with dark postocular bar reduced to 

 different degrees and dark area of external pagina of caudal 

 femora usually obsolete, rarely weakly indicated. 



The following one hundred and fifty three specimens have been 

 studied. 



Arizona: White Mountains, 9300 feet, VII, 24, 1930, (E. R. Tinkham; on 

 floor of pine forest), 3 d" , 1. San Francisco Mountains, VII, 28, 1930, 9400 

 to 9600 feet, (E. R. Tinkham; north slope in grass under Aspen, Poplus 

 tremuloides), 1 cT, 1 9 ; VII, 30, 1897, (J. L. Hancock), 3 cf, paratypes; 

 9700 to 10000 feet, VII, 31, 1919, (Rehn and Hebard; moderately common 

 in upper mountain meadow especially in areas of Sieversia ciliata (Pursh.), 

 a few above in heavy stands of balsam and Aspen thickets, these very intensive 

 in coloration), 50 d\ 72 9,4 juv. c? , 6 juv. 9 ; VIII, 5, 1933, (R. H. Beamer), 

 1 cf , 6 9 , [Univ. of Kansas]; VIII, 10 and IX, 8, 1932, (E. D. Ball), 2 cT, 2 9 , 

 [Univ. of Arizona]. Bill Williams Mountain, IX, 15 to 30, 1917, (O. C. 

 Poling), 19. 



The Artemisiae Group 



This group is erected to include artemisiae Scudder and a closely 

 related species lemhiensis here described. They are separable 

 only by the male genitalia, which differ as follows: 



A. Furcula very small, slender. Cercus with disto-ventral angle 

 no more or very slightly more broadly rounded than the 

 disto-dorsal angle, the dorsal and ventral margins of the 

 distal portion parallel. Generally similarly specialized 

 penis much narrower. Salmon River Mountains, Idaho, 

 from 4000 to 6650 feet artemisiae Scudder 



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