32 



TETTIGID.E OF NORTH AMERICA 



and subdivitlcd into three branches. The basal attachments 

 of tlie trache;E are similar to tliose found among the orthop- 

 tera generally, and designated as shown in the figures. 



The el3-tra or forewings show three trache.'e, but there is 

 no clue as yet to their homologies. The Tettigidea appear to 

 be the most specialized orthopterous type so far es the venation 

 is concerned. 



The middle femora are subject to marked variations and 

 are useful in distinguishing species. They are sometimes quite 

 unaltered (in which case they are spoken of as entire), or com- 



FlG. 12. Femora of Paratettix showing variations, a. Hind femora of 

 P. tuberciilatus sp. n.; b, mid-femora of same species; r, mid- 

 femora P. Me.xicanus var. from Rio Cocula, Gro. Max.; (/and 

 e, P. tiiorsei extensus, California; / and g, P. mexicanus. La 

 Antiqua, Mex.; h and /, P. cucicUiiius, Toronto, Can.;/ and k, 

 P. tt-xaniis, Paige, Texas. 



paratively slender, carinated, quite broad, or rarely passing 

 into lobed or clypeate forms. The legs are more or less com- 

 pressed, the first femora less modified, but in BalrachidiiKB 

 furrowed above; the hind femora are proportionately large, 

 reaching the maximum relative size in Noviotcttix. Near the 

 apex of the superior carina is the femoral lobe, present only 

 in a slight degree in our species. The genicular spine is 

 placed at the very extremity of the femora; the posterior 

 tibia; are multispinose ; the four anterior tarsi are short, the 

 terminal segment being longer than the two others united. 



