162 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



D. Cerci with niesal portion not contrastingly swollen. 



E. Cerci with distal portion weakly to very decidedly depressed 

 and with apex broad and rounded. (Size small to medium.) 



F. Tympanum of tegmina not unusually elongate. Convex callos- 

 ity of lateral lobes not very broad. Vertex moderately produced, 

 (weakly to very weakly ascending). 



G. Cerci with distal portion moderately produced, the depres- 

 sion of the same being general and not more decided on the in- 

 ternal side. 



H. Vertex with sides moderately divergent, greatest width 

 about two-thirds that of proximal antennal point. Eyes 

 decidedly small. Convex callosity of lateral lobes moderately 

 but not decidedly broad. Dorsum of abdomen trifasciate, 

 with median line broad. Cerci not decidedly hea\'y or elon- 

 gate, with distal portion weakly depressed. Ventral margins 

 of caudal femora normally unarmed. 



I. Form slender. Abdominal fasciae moderately distinct, 

 colors not brilliant. fasciatus fascia tus (DeOeer) 



II. Form moderately slender. Abdominal fasciae very 

 distinct, colors brilliant (particularly so in life). 



fasciatus vicinus (Morse) 

 HH. Vertex with sides decidedly divergent, greatest width 

 equaUing that of proximal antennal joint. Eyes normal. 

 Convex callosity of lateral lobes very narrow. Abdomen 

 immaculate, with distal portion, including cerci, pale yellow. 

 Cerci heavy, elongate, with distal portion very decidedly 

 depressed. Ventro-external margins of caudal femora bear- 

 ing normally four to five spines. (Form moderately rolsust.) 



spinosus (Morse) 

 GG. Cerci with distal portion more decidedly produced and very 

 sti'ongly depressed, particularly on the internal side. (Fonn 

 moderately slender. Vertex with sides moderately divergent, 

 greatest width two-thirds that of proximal antennal joint. 

 Eyes normal. Convex callosity of lateral lobes modei'ately 

 but not decidedly broad. Dorsum of abdomen dark brown, 

 in pale examples yellowish. Ventral margins of caudal femora 

 normally unarmed.) brevipennis (Scudder) 



FF. Tympanum of tegmina unusually elongate. Convex callosity 

 of lateral lobes very broad. Vertex distinctly produced. (Form 

 very slender. Vertex weakly ascending, sides moderately diver- 

 gent, greatest width about two-thu-ds that of proximal antennal 

 joint. Eyes normal. Dorsum of abdomen narrowly but usually 

 strikingly trifasciate. Cerci of similar type to those of Jasciatus 

 but distinctly more elongate and attenuate, with distal portion 

 very strongly depressed. Ventral margins of caudal femora 

 unarmed.) gracillimus (Morse) 



