506 FAMILY VII. TETTIGOXIID.E. THE KATYDIDS. 



the hand. Their note is very low and consists of a succession of 

 sounds like zip-zip-zip-zip-zip-zip-zip-zip." Of a specimen kept in 

 captivity Hebard (1915b, 458) says: "Its actions show how abso- 

 lutely nocturnal the species is ; this specimen resting rigid in some 

 concealed position during the day, with cephalic limbs and an- 

 tennae directed straight forward and median and caudal limbs 

 straight backward, but at night moving actively about and ex- 

 tremely alert and rapid in its movements." 



228a. BELOCEPHALUS SABAUS SLEIGHTI Davis, 1914, 199. Pine Key Cone- 



head. 



Size, form and color of B. sabalis. Differs only in having the fas- 

 tigium and hind femora a little shorter and in the form of the V-shaped 

 notch of supra-anal plate. In sabalis the sides of this notch are straight 

 with the apical angle (point of the V) acute. The prongs formed by the 

 V have their extreme tips acute and located at the middle of each prong, 

 (Fig. 166, a.) In sleighti the notch is slightly deeper, the apical angle 

 narrowly rounded and the inner sides of the V concave, so that the tips of 

 the resulting prongs are more obtuse and located on their outer margins 

 (Fig. 166, &.) 



Big Pine Key, Fla., July ID, Sept. 19 (Davis). In the meas- 

 urements of a series of sabalis given by B. & H. (1914c, 401) the 

 length of the hind femora is shown to vary from 15.9 to 19.7 mm. 

 and the "length of fastigium from the eyes" from 3.1 to 4.5 mm. 

 The measurements of these parts given by Davis in his descrip- 

 tion of slcigliti and in the key fall well within the individual 

 variations of sabalis shown by B. & II. The slight difference in 

 the form of supra-anal notch of male I consider also as well with- 

 in the limits of specific variation of such organs, as it has been 

 previously shown that the secondary genital organs of the males 

 of Orthoptera are more subject to variation than any other part 

 of ihe body. I therefore regard slcigliti as only an incipient 

 species or variety of sabalis. the slight differences in structure be- 

 ing due to some feature of environment or inherited tendency, as 

 yet unexplained. B. sleif/liti was described from Big Pine Key 

 and has not been recorded elsewhere. It was also found on saw 

 palmetto and, says Davis, had a "song much like that of B. 

 .w&flZis/-' its habits and note thus being additional evidence of its 

 specific identity with that species. 



229. BELOCEPHALUS SUBAPTERTJS Scudder, 1875, 459. Half-winged Cone- 

 head. 



Male. Size medium for the genus; form moderately robust. Color 

 usually pale green tinged with yellow, with two narrow dark stripes ex- 

 tending from middle of fastigium to hind margin of pronotum; tip of 

 fastigium, basal tooth of same, clypeal suture and mandibles shining 



