372 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



In both of these species the caudal tibiae are normally rich 

 pink, but larger series may show rare individuals of both sexes to 

 have the caudal tibiae buffy weakly tinged proximad and distad 

 with brown as is the case in truncatus. 



The structure of truncatus gives to it a suggestion of the general 

 appearance of a small species of Conalcaea ; this is shared to some 

 extent by the present species. 



Type. — cf; Magdalena Mountains, New Mexico. Elevation 

 9900 feet. July 23, 1930. (E. R. Tinkham). [Hebard Col- 

 lection, Type no. 1265]. 



Size medium, form more robust than average. Vertex and 

 frontal costa as in truncatus, slightly broader than in femur- 

 nigrum; the former concave between the distinct lateral carinae, 

 the latter lacking lateral carinae, broadening appreciably to 

 opposite median ocellus and distinctly impressed about it. 

 Pronotum with medio-longitudinal carina percurrent but strong- 

 est on metazona, sulci distinct on dorsum, caudal margin of 

 dorsum almost transverse and showing extremely faint convexity. 

 Prosternal spine moderately elongate, rounding distad to the 

 rather strongly rounded apex, not as slender as in femur-nigrum 

 or truncatus. Tegmina ovate pads separated by an interval (very 

 narrow to rather decided in series), considerably shorter than 

 pronotum. Apex of abdomen very conspicuously thickened 

 though not as much enlarged as in truncatus. Furcula repre- 

 sented by small stout tapering spikes, each less than twice as long 

 as its basal width, shorter than in truncatus. Supra-anal plate 

 decidedly shorter and more simple than in that species, slightly 

 longer than proximal width, shield-shaped, lateral margins convex, 

 lateral portions longitudinally broadly concave with intervening 

 median sulcus coarse proximad, then followed by a low flattened 

 carina which is impressed distad, short disto-lateral carinae very 

 vaguely suggested. Cercus of same general type as in truncatus 

 but not showing flattening of external surface and with apical 

 portion narrower; very short, broad proximad, tapering distad to 

 a broadly rounded apex which is directed dorso-distad, dorsal 

 margin broadly and evenly concave, ventral margin broadly 

 convex, then very faintly concave and becoming almost straight 

 in distal portion. Penis broad, erect, shaft with margins meeting 

 caudad to form a V-emargination, proximal processes large, erect, 

 in caudal aspect with apices pointed but in lateral aspect these 

 are seen to be produced in delicate rounded rectangular flanges 

 directed cephalad, succeeding processes prominent, erect and 

 fairly broad lamellate plates with almost attingent sharply 



