504 FAMILY VII. TETTIGONIIDJE. THE KATYDIDS. 



cult of separation. As will be noted farther on, I consider some 

 of the forms treated in the key as only varieties of the older named 

 species. 



KEY TO SPECIES OP NORTH AMERICAN BELOCEPHALUS. 



.a. Vertex of head produced as a stout subcylindrical thorn, tapering 



apically. 



b. Outer extremities of subgenital plate not bent upward and in- 

 ward, nor produced into points. 

 c. Antennae unicolorous; body of male about 40 mm. in length. 



d. Supra-anal plate with inner sides of V-shaped notch nearly 



straight (Fig. 166, a) ; hind femora about 20 mm. in length. 



228. SABALIS. 



(Id. Supra-anal plate with inner sides of V-shaped notch curved 

 (Fig. 166, b); hind femora about 18 mm. in length. 



228a. SLEIGHTI. 



cc. Antennas spotted or annulated; body of male usually less than 

 40 mm. in length. 



e. Length of body more than 30 mm. 



/. Supra-anal plate with V-shaped notch broadly open, and 

 with sides straight (Fig. 166, c); length of body about 

 34 mm.; a more slender species than davisi. 



229. SUBAPTERUS. 



ff. Supra-anal plate with V-shaped notch not broadly open; 

 sides of notch curved; length of body about 35 mm. 



229a. DAVISI. 



ee. Length of body about 24 mm.; supra-anal plate with V- 

 shaped notch narrow, its inner sides a little curved, the 

 excavated part surrounding the notch with sides declivit- 

 ous (Fig. 166, fZ.) 230. EXCAVATUS. 

 bb. Outer extremities of subgenital plate bent upward and inward 

 and produced into sharp points; antenna? spotted; length of 

 body about 34 mm. 229b. HEBARDI. 

 aa. Vertex of head rounded, not produced as a sharp pointed thorn. 



g. Outer extremities of subgenital plate not bent upward and in- 

 ward into points; supra-anal plate with V-shaped notch very 

 broad, its inner sides straight (Fig. 166, e) ; length of body of 

 male about 25 mm. 231. REHNI. 



gg. Outer extremities of subgenital plate bent upward and inward 

 and produced into points; supra-anal plate with V-shaped notch 

 not very broadly open, its inner sides curved (Fig. 166, f ) ; 

 length of body of male about 30 mm. 232. MICAXOPY. 



228. BELOCEPHALUS SABALIS Davis, 1912a, 123. Palmetto Cone-head. 



Male. Size large for the genus, form robust. Color usually uniform 

 green, mandibles and often the clypeal suture black. Fastigium nearly as 

 long as head behind the eyes, sharply pointed, its tip and that of the lower 

 basal tooth black. Antenna? about as long as body, uniform pale yellow. 

 Disk of pronotum feebly rugose, lateral lobes more strongly so. Tegmina 

 less than two-thirds the length of pronotum, their tips broadly obliquely 

 rounded. V-shaped notch of supra-anal plate about as wide as deep, 



