JAMES A. G. REHN AND MORGAN HEBARD 275 



AA. Disto-dorsal abdominal segment with a median produced pistillate 

 process. Subgenital plate compressed distad. Cerci relatively short, 

 very strongly incurved distad with distal portion decidedly enlarged. 

 B. Lateral angles of pronotum very broadly rounded. Tegmina ex- 

 tremely narrow, much narrower than length of pronotum. (Pro- 

 duction of disto-dorsal abdominal segment furcate at apex, with 

 lateral processes short and dorsal surface of same strongly declivent 



distad.) strigata Scudder 



BB. Lateral angles of pronotum not broadly rounded. Tegmina not very 

 narrow, width greater than length of pronotum. 

 C. Production of disto-dorsal abdominal segment truncate at apex 

 with a slight median projection and with strongly compressed ver- 

 tical lateral flanges, which completely embrace and generally ex- 

 tend beyond the sides of the subgenital plate when in natural 



position. . . ., texensis Saussure and Pictet 



CC. Production of disto-dorsal abdominal segment furcate at apex 

 with no median projection. 



D. Furcate portion of production of disto-dorsal abdominal seg- 

 ment lobate, these lobes bearing ventrad small vertical longi- 

 tudinal flanges. 



E. Lobes of furcate portion of production of disto-dorsal ab- 



dominal segment distinctly tapering distad when seen from 

 above. (Tegmina very broad and short.) . .pistillata Brunner 

 EE. Lobes of furcate portion of production of disto-dorsal ab- 

 dominal segment subequal in width when seen from above. 



F. Size small, form compact. Tegmina rather broad and short, 



curvicauda borealis new subspecies 

 FF. Size large, form less compact. Tegmina decidedly longer. 

 G. Tegmina proportionately wider, lateral angles of prono- 

 tum decided curvicauda curvicauda (De Geer) 



GG. Tegmina proportionate!}^ narrower, lateral angles of pro- 

 notum less decided curvicauda laticauda Brunner 



DD. Furcate portion of production of disto-dorsal abdominal segment 

 lobate, these lobes not bearing ventrad small vertical longitudinal 

 flanges. 



E. Lobes of furcate portion of production of disto-dorsal abdominal 



segment not compressed lateradand not much longer than broad. 



F. Lobes of furcate portion of production of disto-dorsal abdom- 



inal segment decidedly swollen, broadest proximad when 



viewed from above furcata furcata Brunner 



FF. Lobes of furcate portion of production of disto-dorsal ab- 

 dominal segment less decidedly swollen, broadest meso-proxi- 

 mad when viewed from above. 



G. Form less robust, limbs proportionately shorter. Antennae 



unicolorous furcata furcifera Scudder 



GG. Form more robust, limbs proportionately longer. An- 

 tennae annulate in tj-pical material paronae Griffini 



TRANS. AM. ENT. SOC, XL, 



