REHN AND HEBARD 25 



acute. (Ventro-external margin of caudal femora generally 

 unarmed.) bullatum new species 



EE. Fastigium relatively narrower. Metazona occupying 

 distinctly less than half of dorsal length of pronotum. 

 Lateral lobes of pronotum relatively broader, ventro- 

 caudal ang'e less acute. (Ventro-external margin of caudal 

 femora with from two to eight spines.) 



laticauda Rcdtenbacher 



D. Tooth of cercus strongly adpressed against proximal portion 



of sinuate carina. Caudal margin of lateral lobes of pronotum 



wdth httle indication of humeral sinus and remainder of margin 



distinctly sinuate. All tibiae blackish. (Ventro-external margin 



of caudal femora armed.) nigripes Scudder 



AA. Cercus moderately elongate or very elongate, portion distad of insertion 



of median tooth markedly longer than that proximad of same. General form 



relatively more slender. 



B. Apex of cercus not decidedly acuminate. Tooth of cercus in position 

 usual in genus, not dorsad or distinctly ventro-mesad in insertion or not 

 strongly proximad in trend (except in superbum, which has the tooth dis- 

 tinctly ventro-mesad in insertion). 



C. Lateral lobes of pronotum with no humeral sinus. Genicular 

 lobes of caudal femora, unispinose. superbum new species 



CC. Lateral lobes of pronotmn with more or less decided himaeral 

 sinus. Genicular lobes of caudal femora bispinose. 



D. Lateral lobes of pronotum broad, slightly broader than deep. 



Ventro-external margin of caudal femora always armed. General 



coloration variegated. (Size small.) minor Bruner 



DD. Lateral lobes of pronotum narrower, not quite as broad as 



deep. Ventro-external margin of caudal femora verj'^ rarely 



armed. General coloration, except face, more uniform. (Size 



small to large.) concinnum Scudder 



BB. Apex of cercus decidedly acuminate (except in superbum). Tooth of 



cercus inserted on level with dorsal plane of cercus (volantum), diverging 



from ventro-internal face {bradleyi and unispina) or directed strongly 



proximad {fidicinium, militare and fraiernum) . 



C. Speculum of stridulating field less elongate and narrow, but 

 slightly longitudinal. 



D. Stridulating area of tegmina of type usual in genus. Dorsal 

 line of pronotum appreciably ascending dorso-caudad on jneta- 

 zona. Genicular lobes of caudal femora bispinose. 



E. Lateral lobes of pronotum distinctly deeper than broad. 

 Cercus relatively more slender. Fastigium broader. 



militare Rehn and Hebard 

 EE. Lateral lobes of pronotum as broad as deep. Cercus 

 relatively more robust. Fastigium narrower. 



fidicinium Rehn and Hebard 



TRANS. AM. ENT. SOC, XLI. 



