REHN' AND HEBARD 39 



B. Genicular lobes of cephalic, median and caudal femora bearing two 

 spines. Lateral lobes of pronotum with cephalic and caudal margins 

 not directed obliquely ventro-cephalad. Fastigium of vertex smooth 

 and subhorizontal proximad, declivent distad, not in contact with 

 frontal fastigium. Tegmina elongate lanceolate with apex rounded. 

 (Lateral lobes of pronotum with length greater than width. Cerci 

 crassate, apex heavily toothed. Subgenital plate of male verj^ elon- 

 gate, supplied with articulate styles which are very long for the 



group.) Gallinsara Rehn 



BB. Genicular lobes of cephalic, median and caudal femora bearing a 

 single spine. Lateral lobes of pronotum with cephalic and caudal 

 margins directed obliquely ventro-cephalad. Fastigium of vertex 

 declivent, tri-tuberculate proximad, in partial contact with frontal 

 fastigium. Tegmina very broad with apex obliquely truncate. (Lat- 

 eral lobes of pronotum with length less than width. Cerci crassate 

 proximad, becoming long and slender with apex sharp. Subgenital 

 plate of male not elongate, supplied with small bulbous non-articulate 



points. ) Dolichocercus new genus 



AA. Cephalic and median femora briefly subcarinate disto-dorsad. 



B. Fastigium of vertex subhorizontal, in full contact with frontal 

 fastigium with which it presents a deplanate cephalic surface. Lateral 

 lobes of pronotum angularly inserted. Dorsal abdominal segments 

 with margins acute-angulate produced mesad. (Abdominal segments 

 dilated. 2) 



C. Fastigium of vertex with dorsal surface on one level. Lateral 

 lobes of pronotum vertical or nearly so. Tegmina long or ab- 

 breviate, not aborted. Wings with distal portion exposed, never 

 rudimentary. (Subgenital plate of male bearing articulate styles 

 or non-articulate styliform appendages. Genicular lobes of ce- 

 phalic and median femora unispinose or bispinose. Tegmina ob- 

 liquely truncate or rounded at apex.) Insara \\ alker 



CC. Fastigium of vertex with dorsal surface on three distinct levels. 

 Lateral lobes of pronotum inserted at a jnore obtuse angle, regu- 

 larly diverging ventrad. Tegmina aborted. Wings concealed and 

 rudimentary. (Subgenital plate of male bearing non-articulate 

 knobs. Genicular lobes of cephalic and median femora bispinose. 



Tegmina broadly rounded.) Brachyinsara new genus 



BB. Fastigium of vertex declivent, weakly in contact with frontal 

 fastigium with which it does not present a deplanate cephalic surface. 

 Lateral lobes of pronotum roundly inserted (so that the pronotum 

 is more or less decidedly sellate). Dorsal abdominal segments with 

 margins straight or crenulate, not acute-angulate produced mesad. 



- The abdomen is more dilated in the species of Insara and Brachyinsara 

 than in the species of Arethaea. Naturally, however, females of all the 

 species have the abdomen usually much more dilated than the males. 



TRANS. AM. ENT. SOC, XL. 



