230 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



E. Cerci with distal portion not greatly produced, weakly to very 

 decidedly depressed, and with apex broad and rounded. 



F. Tympanum of tegmina not unusually elongate. Convex 

 callosity of lateral lobes not very broad. Vertex moderately pro- 

 duced. 



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

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

 inner side. 



H. Fastigium of vertex about two-thirds^ width of basal an- 

 tennal joint. Ventral margins of caudal femora normally 

 unarmed (spines when present never more than one to three). 



I. Eyes moderately large. Convex callosity of lateral 

 lobes very narrow. Abdomen immaculate, with distal half, 

 including cerci, uniform and striking yellow. Distal por- 

 tion of cerci decidedly depressed and narrowing more sharply 

 to the more narrowly (but still rather broadly) rounded 

 apex. (Form moderately slender.) cinereus (Thunberg) 



II. Eyes decidedly small. Convex callosity of lateral 

 lobes moderately but not decidedly broad. Dorsum of 

 abdomen trifasciate, with median line broad. Distal por- 

 tion of cerci weakly depressed, scarcely narrowing to the very 

 broadly rounded apex. 



J. Form slender. Abdominal fasciae moderately dis- 

 tinct, colors not brilliant, fasciatus fasciatus (DeGeer) 

 JJ. Form moderately slender. Abdominal fasciae very 

 distinct, colors brilliant (particularly so in life). 



fasciatus vicinus (Morse) 

 HH. Fastigium of vertex as wide as proximal antennal joint.* 

 Ventro-e.xternal margins of caudal femora normally armed. 

 I. Form moderately robust. Convex callosity of lateral 

 lobes very narrow. Abdomen immaculate, with distal por- 

 tion, including cerci, clear pale yellow. Cerci heavy, 

 elongate, with distal portion decidedly depressed, scarcely 

 narrowing to the very broadly rounded apex. \'entro- 

 extemal margins of caudal femora bearing normally three 

 and four spines. spinosus (Morse) 



^ Though the above is the normal condition in C. cinereus, this usually very 

 constant character varies occasionally in that species from slightly less than 

 two-thirds of to fully the width of the proximal antennal joint, as discussed in 

 the specific treatment. 



^ This usually very constant character shows a decided variability in C. 

 ictus; one series from the state of Vera Cruz, Mexico, including specimens in 

 which the fastigium of the vertex is but two-thirds as wide as the proximal 

 antennal joint. In consequence this variation is important in determining 

 material from thai region and must not be overk)oked. 



