480 FAMILY VII. TETTIGONIIDJ3. THE KATYDIDS. 



of teginina and degree of serration of ovipositor, in their key in 

 separating oblongifolia from their floridana and carinata. 



218a. AMBLYCOBYPHA OBLONGIFOLIA FLORIDANA Rehn & Hebard, 1905, 42. 



A form or race of oblongifolia differing only by the characters given 

 in the key, which are taken from the key of R. & H. (1914b, 319), and by 

 having the disk of pronotum slightly longer, its sides less divergent back- 

 ward in the female. Length of body, $, 25 25.8, 9, 21 28.3; of pro- 

 notum, $, 6.6, $, 77.4; of tegmina, $, 34.635.8, 9, 3236.8; of hind 

 femora, $, 28.730.4, 9, 28.532.6; of ovipositor, 1112.2 mm. 

 (Fig. 159.) 



>"*=' 



Fig. 159. Female type. Natural size. (After R. & H.) 



The original description of this form was prefaced thus: "Al- 

 lied to A. oblongifolia but differing in the straighter ovipositor 

 and less angulate angles of disk of pronotum." Later (1907, 301) 

 R. & H. say: "The less curved form and rather smaller size of 

 the ovipositor will serve to separate the female of floridana from 

 that of oblong if olid , while in the male the tympanum is distinctly 

 narrower, both actually and proportionally, than in oblongifolia. 

 The lateral angles of the disk of the pronotum are as a rule by no 

 means as sharply rectangulate as in oblongifolia and the disk is 

 broader caudad in the latter species. From the evidence in hand 

 it appears that floridana represents the southern extreme of ob- 

 longifolia, specimens from Thomasville, Ga., being as near flori- 

 dana as oblongifolia." Still later (1914b, 322) they state that the 

 Thomasville specimens connect "true floridana with a northern 

 sub-species (8. f. carinata) of the same stock, which in its turn is 

 perfectly distinct from oblongifolia.''' 



All of the differences which they give, both in descriptions and 

 keys, separating the three forms, are comparative only, and read- 

 ily come within the limits of variation of a single species over a 

 wide extent of territory. The lateral carinse of northern and east- 

 ern oblongifolia are always rounded on the proxoua, and vary 

 greatly in continuity, in the majority of Indiana specimens being 

 wanting on the apical third or fourth of pronotum, where the disk 

 is rounded directly into the sides. The disk of prouotum is also 

 variable in length and divergence and the ovipositor in length and 

 degree of curvature. While extremes of the three forms are ob- 

 viously different, T regard both floridana and carinata as varieties 



