276 NEW NORTH AMERICAN MELANOPLI (oRTHOPTERa) 



gray-green. This shows that the color of the caudal tibiae is of 

 no diagnostic significance, at least in one sex of the present species. 

 Type. — cf ; Duck Lake, Cedar Mountains, Iron County, Utah. 

 Elevation, 9000 feet. July 14, 1917. (G. P. Englehardt.) 

 [Hebard Collection, Type no. 501.] 



Size small for the genus, not as small as in B. excelsa Rehn; form heavy, as in 

 pinguis; surface very feebly pilose. Head broad and full, vertex gently tumid; 

 fastigium shallowly concave, the lateral margins moderately prominent, 

 rounded; frontal costa much as in pinguis, but very slightly narrower and 

 moderately punctate, least width slightly greater than width of proximal 

 antennal joint, shallowly sulcate, the lateral margins like those of the fastigium 

 but slightly broader. Eye as long as infra-ocular sulcus. Pronotum as in 

 pinguis, expanding moderately caudad, this stronger between first and second 

 transverse sulci, with distinct lateral carinae on prozona not as decided as in 

 compacta, median carina slightly .'ess well developed than in pinguis, weak but 

 percurrent and cut only by the principal sulcus, continued on the three succeed- 

 ing dorsal segments. Tegmina and wings absent, as in all species of Brady- 

 notes. Interspace between mesosternal and metasternal lobes variable.'" 

 Furcula absent. Supra-anal plate trigonal-produced^" with medio-longitudinal 

 and lateral concavities decided proximad, the latter the more so. Cerci as long 

 as supra-anal plate, tapering rather strongly in proximal half; distal half slender, 

 more slender than in pinguis, tapering very slightly to the rounded apex, which 

 is more sharply rounded ventrad than dorsad. Subgenital plate as in pinguis; 

 conical, lateral margins very feebly convex, then as feebly concave to apex, 

 which is small, slightly produced and feebly notched. Cephalic and median 

 femora slightly inflated, very feebly bowed. 



Allotype. — 9 ; same data as type, but taken July 17, 1917. 

 [Hebard Collection.] 



Larger and more robust than male. Lateral carinae of fastigium distinct 

 proximad between eyes, obsolete^i above the foveolae; frontal costa broader 



35 In the two males at hand, the mesosternal interspace is as wide as the lobes 

 themselves in one, distinctly wider in the other; the metasternal interspace is 

 quadrate in one, distinctly transverse in the other. These features are subject 

 to individual variation in many species of the Melanopli and, in consequence, 

 are of far less diagnostic value than has been suppo.sed by Scudder and other 

 authors. 



*° In the type this plate is narrow, with apex broadly rounded; in the para- 

 type broader proximad, narrowing more strongly to the apex which is rather 

 sharply rounded, forming an angle of slightly less than 90°. This much indi- 

 vidual variability in the form of the male supra-anal plate is unusual. In the 

 type of pinguis, the supra-anal plate is as long as its basal width, about inter- 

 mediate in form between the present extremes, with concavities less decided. 



■•1 Varying to sul)obsolete in a few s])ecimens of the series. 



