496 FAMILY VII. TETTIGONIID.33. THE KATYDIDS. 



tips separated by a distance greater than the length of lower 

 fork; subgenital plate produced into a long spear-shaped append- 

 age, grooved above. 



As pointed out by Kirby (1906, 343) this generic name replaces 

 Cyrtoplii/llus Burm. (1838, 697) for our common eastern true katy- 

 dids. Caudell (1906, 37) recognized four species as belonging to 

 CyrtopJiyllus, three of which he described as new. One of these 

 (eloiigatus) is now known to be a synonym of P. caiuellifoUa 

 (C. perspk-niatus) while another is placed by R. & H. (1916) as a 

 southern race of that species. Our two eastern forms were sepa- 

 rated by Caudell as follows : 



KEY TO EASTERN FORMS OF PTEROPHYLLA. 



a. Lower branch of male cerci with incurving apical portion scarcely 

 as long as the less tapering basal portion, the apex of the broad 

 base of the cercus between the two branches less enlarged; tegmina 

 of female broadly rounded apically, the posterior (sutural) margin 

 usually as convex as the costal margin. 226. CAMELLIFOLIA. 



aa. Lower branch of male cerci with incurving apical portion as long as 

 the thick, uniformly tapering basal portion, the cercus between the 

 two branches much enlarged, forming a triangular projection; teg- 

 mina of female narrowly rounded apically, the posterior margin 

 almost straight. 226a. IXTERMEDIUS. 



226. PTEROPHYLLA CAMELLIFOLIA (Fabricius), 1775, 283. Northern True 

 Katydid. 



Size large, form robust, the sexes subequal. Tegmina dark green; 

 "body, head, pronotum and legs paler green tinged with yellow, often be- 

 coming dull greenish-yellow in drying; tympanum of male brown. Disk 

 of pronotum saddle-shaped, coarsely and densely punctate; metazona 

 broader than prozona, usually distinctly sloping from the broadly rounded 

 or subangulate hind margin to the principal transverse sulcus, the latter 

 descending on lateral lobes much farther than the anterior sulcus; pro- 

 zona about as long as metazona, crossed at middle by the deep anterior 

 sulcus, its front margin truncate; lateral lobes subquadrate, all their mar- 

 gins nearly straight, the lower angles rounded. Tegmina as described 

 under subfamily heading, those of female about two and one-half times 

 as long as broad. Male with lower branches of cerci about one-fourth 

 shorter than upper ones, their tips strongly incurved and partly clasping 

 the sides of the elongate subgenital plate, the upper forks crossing each 

 other, each ending in a minute sharp black spine. Ovipositor as described 

 under subfamily heading. Length of body, $, 25 30, 9, 26 34; of pro- 

 notum, $ and 9, 5.56; of tegmina, $, 32 38, 9, 3437; of hind fe- 

 mora, $, 1821, 9, 1923; of subgenital spine, $, 1214.5; of oviposi- 

 tor, 16.5 20 mm. Width of pronotum, $ and 9, 6 6.5; of tegmina, $, 

 1720, 9, 1416; of ovipositor, 3.2 mm. (Fig. 165.) 



This broad-winged katydid occurs in considerable numbers 

 throughout Indiana, but is much more commonly heard than seen, 



