538 



FAMILY VII. TETTIGONIIDJE. THE KATYDIDS. 



Fig. 179. Dorsal and lateral outlines of left cercus of male Orchcliminn, X I0 - 

 a, agile; b, erythrocephalum; c, I'lilgarc; d, gladiator; e, pulchellum; i, niyripes; g, cal- 

 caratnni; h, bullatum; n = node on cercus of vulgar c. (a g, After R. & H.; h, original.) 



KEY TO EASTEKX SPECIES OF GROUP I OF OBCHELIMUM. 



a. Tooth of male cercus not longer than apical portion of the shaft and 



not strongly aciculate (Fig. 179, a /. ) 



&. Upper surface of male cercus without a distinct sinuate carina; 

 ovipositor (except in gladiator) not or very little more than 

 half as long as hind femora (Fig. 180.) 



c. Cercus distinctly depressed, its tooth flattened at base and set 

 at right angles to the shaft; ovipositor deeper at base than at 

 any other point; humeral sinus distinct but shallow (Fig. 

 180, a.) 245. AGILE. 



<?c. Cercus not distinctly depressed, its tooth more or less thick- 

 ened at base; ovipositor deepest at some point beyond the 

 base. 



d. Cercus without a rounded tubercle or node above and between 

 the tooth and apex; head more or less reddish; speculum of 

 stridulating field of male longer than broad (Fig. 182, ft.) 



246. ERYTHROCEPHALUM. 



eld. Cercus with a rounded tubercle or node above on apical half 

 (Fig. 179, c, n) ; head rarely reddish; speculum subquad- 

 rate (Fig. 182, a.) 



e. Humeral sinus of lateral lobes distinct (Fig. 180, c) ; tooth 

 of cercus shorter than apical half of shaft, tip of shaft 

 bluntly rounded (Fig. 179, c) ; ovipositor less than half 

 the length of hind femora, its upper margin distinctly 

 curved. 247. VULGARE. 



ee. Humeral sinus scarcely evident; tooth of cercus as long as 

 apical half of shaft, the tip of shaft subacute; ovipositor 

 almost two-thirds as long as hind femora, its upper mar- 

 gin nearly straight (Figs. 179, 180, d.) 248. GLADIATOR. 

 6b. Upper surface of cercus with a distinct obtuse sinuate carina; 



ovipositor more than half the length of hind femora, 

 f. Humeral sinus distinct; tibiae not blackish; notch of male su- 

 pra-anal plate U-shaped, as broad or broader than deep; tooth 



