SUBFAMILY II. BATRACHIDIN^E. 



18.1 



preceding genera ; tegmina elongate, narrow, often with a pale 

 spot near apex; wings in the long forms passing tips of pronotum; 

 first and third joints of hind tarsi either subequal in length or 

 the first slightly the longer. Males much more slender than fe- 

 males, and as both prouotnm and wings vary much in length in the 

 same species, much confusion of synonymy has resulted. 



Fig. 65. Showing form of vertex and front margin of pronotum of Tcttigidea. a, T. 

 prorsa Scudd.; b, T. aniiata Morse; c, T. latcralis (Say). All greatly enlarged. (After Han- 

 cock.) 



KEY TO EASTERN SPECIES OF TETTIGIDEA. 



a. Front dorsal margin of pronotum obtusely angulate or rounded, 

 feebly prolonged over the head, seldom reaching and never extend- 

 ing beyond the middle of eyes (Fig. 65, c. ) 



Z>. Visible portion of vertex scarcely longer than wide, its front mar- 

 gin rounded, not distinctly produced in front of eyes; head wide, 

 not subconical. 



c. Antennas slender, filiform, the joints of middle third at least 

 three times as long as broad; eyes prominent; front margin 

 of pronotum usually broadly rounded (Fig. 65, c. ); frontal 

 costa more slender. 77. LATERALIS. 



cc. Antennae stouter, the joints of middle third distinctly flattened 

 and not more than twice as long as broad; eyes smaller; 

 front margin of pronotum usually obtusely angulate (PI. II- 

 Fig. 5) ; frontal costa stouter, more prominent. 



77a. PARVIPENNIS. 



b&. Visible portion of vertex distinctly longer than wide, its front 



margin obtusely angulate and projecting in front of eyes, its 



sides widely emarginate, the concavity forming a regular curve 



about the contour of the eyes; head narrow, subconical. (Fig. 



65, a.) 78. PRORSA. 



aa. Front dorsal margin of pronotum produced on the head and between 



the eyes often nearly to their front in the form of an acute angle 



or sharp cusp (Fig. 65, 7>.) 



d. Median carina of vertex but little projecting beyond the eyes; 

 pronotum broad across the shoulders, its dorsal surface 

 strongly rugose or wrinkled, its median and lateral carina? well 

 developed. 79. ARJIATA. 



dd. Median carina of vertex more projecting; pronotum narrow 

 across the shoulders, its dorsal surface finely wrinkled, its ca- 

 ring but slightly developed. 79a. SPICATA. 



