264 NEW NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



length considerably greater than the genae. Pronotum with transverse sulci 

 apparent but not pronounced, those cephalad feeble ; medio-longitudinal carina 

 of metazona distinct; caudal margin obtuse-angulate produced with apex 

 rounded. Tegmina small, sub-ovate, attingent pads, about as long as pro- 

 notum, 9 with apices rather sharply rounded. Cerci simple, moderately broad 

 and compressed at base, tapering slightly and evenly in proximal half, the 

 distal half very slender, nearly subequal in width to the rounded apex. Sub- 

 apical tubercle of subgenital plate decided, its apex as slender and sharply 

 rounded as the cereal apices. Cephalic and median femora almost straight 

 and moderately heavy, not as much bowed or as heavy as in this sex of the 

 majority of the species of Aeoloplus. 10 Median tibiae scarcely at all curved. 

 Caudal femora without margin of ventral surface produced proximad in a 

 shielding plate. 



Allotype. — 9 ; same data as type. [Hebard Collection.] 



Agrees with the type in ambisexual features, differing in the following re- 

 spects. Size slightly larger, 11 form appreciably heavier. Fastigium of vertex 

 broader. Ovipositor valves with apices moderately elongate and gently 

 curved. Cephalic and median femora longer and more slender. Median 

 tibiae straight. 



Measurements (in millimeters) 



_y\ Length of Length of Length of Width of Length of 



O body pronotum tegmen tegmen caudal femur 



Singatse Range, Mason, Ne- 

 vada, type 12 3 2.9 1.9 6.9 



Singatse Range, Mason, Ne- 

 vada, paratype 12. 1 3 3.6 2 6.8 



Singatse Range, Mason, Ne- 

 vada, paratype 12.4 3.3 4.7 2.1 7 



9 

 Singatse Range, Mason, Ne- 

 vada, allotype 14,3 3.3 3.2 2 7.7 



Singatse Range, Mason, Ne- 

 vada, paratype 15.1 3.6 3.3 2 7.8 



Mina, Nevada 16.5 3.7 5.8 2.1 8 



Mina, Nevada 15.5 3.4 6 2.2 8 



Mina, Nevada 16.3 3.9 6.2 2.3 8.6 



Pilot Mountains, Nevada .. . 15 3.6 5.9 2.2 8 



Pilot Mountains, Nevada .. . 16.2 3.5 5.6 2 8 



Pilot Mountains, Nevada .. . 16.5 3.8 5.9 2.2 8.1 



9 The tegmina vary in the present species from this type to a half fully- 

 developed condition. Though clearly largely individual, geographic dis- 

 tribution may prove to have some effect on this feature. See table of 

 measurements. 



10 Examination of the material at hand shows these to be secondary sexual 

 features, as is the curvature of the median tibiae, differing in degree of develop- 

 ment in the male sex of different species of the genus. 



11 The majority of females at hand are distinctly larger than the type. 



