170 NORTH AMERICAN MELANOPLI (ORTHOPTERA) 



erately elongate, gradually and evenly tapering to distal third, there 

 with dorsal margins feebly divergent then rounding into the trans- 

 verse distal margin, this enlarged distal portion inbent with dorsal 

 surface (which slants dorso-laterally) feebly concave. Occupies that 

 portion of the prairie strip between the humid East and semi-arid 

 plains from Labette and Cowley Counties in southeastern Kansas 

 south to Waxahatchie and Comanche County in northeastern Texas. 16 



1. texanus (Scudder) 



Penis with exposed portion of parameres elongate, tubular, curved 

 cephalad but not specialized at apices. Cercus comparatively small, 

 straight, tapering in proximal third, thence expanding moderately and 

 then narrowing, thus forming a moderately elongate spatulate distal 

 portion which is not incurved and is rounded to its acute apex, fully 

 twice as long as broad with external surface feebly concave. Known 

 from Montgomery County in southeastern Kansas to Magazine Moun- 

 tain, Arkansas and Bonita, Texas 3. inconspicuus Caudell 17 



4. Cercus not bent inward, produced as symmetrical lamellate plates 

 (which curve gently into a dorso-lateral slant, with dorsal margin 

 broadly and ventral margin more weakly convex to the rounded apex 

 and external surface slightly convex but becoming impressed toward 

 the margins. Penis with dorsal lobes produced to form a tubular 

 sheath for the ectoparameres, its truncate apex simple and not sur- 

 passed by the latter which may be seen within the deep meso-caudal 

 cleft of the tube so formed. Brazos County in south-central eastern 

 Texas 18 (in open Post Oak woods) 2. warneri Little 



Cercus bent dorsad and inward in all but basal quarter, the enlarged 

 lamellate plates then formed (which slant dorso-laterally) roughly 

 quadrate with dorso-proximal and ventro-distal angles broadly rounded 

 and external surface irregularly flattened. Penis with dorsal lobes 

 produced to form a longer and more slender tubular sheath for the 

 ectoparameres, its apex expanded and produced in points to their 

 apices as shown in plate X, figure 13. McCurtin County and Nash- 

 oba in extreme southeastern Oklahoma 4. oklahomae new species 



It will be seen that the higest specialization of the supra-anal 

 plate and cerci occurs in angularis, highest specialization of the 

 penis in oklahomae. There are four distinctive types of penis; 



16 Though not yet known from Oklahoma the species undoubtedly occurs 

 in the eastern portions of that State. 



17 Morse's latens was placed as a synonym by Hebard in 1931, Proc. Acad. 

 Nat. Sci., Phila., lxxxiii, p. 178. 



18 First incorrectly recorded as texanus from this locality by Little in 

 1926. 



