1916.] NATURAL SCIENCES OF PHILADELPHIA. 153 



are solely for the convenience of the student; thus in the Xew 

 Jersey scries noticeable variation toward a weakly cuspidate condition 

 is discernible, while in the material from Louisiana, though all are 

 of the strongly cuspidate condition, the degree differs individually. 

 Were it not for the fact that large series taken in restricted localities 

 show in several instances forms typical of both armata and davisi, 

 we would be led to consider the latter a valid geographic race. 

 The only other characters given for davisi, tegminal abbreviation 

 and size of the tegminal spot, are even more variable in the present 

 species than the character discussed above, and we are consequently 

 obliged to place davisi in the synonymy under the present species. 



The abbreviate condition in the present species is more common 

 than the caudate phase; this is constant throughout the insect's 

 distribution and is very probably clue to immediate environment. 

 The degree of cuspidation of the cephalic margin of the pronotum 

 is found to vary least in caudate individuals, none of these lacking 

 the usual cuspidation. 



The species has been found in scant swamp-grasses along "branch" 

 (Fayetteville), common on bare, black swamp soil (Lake Waccamaw), 

 occasional on grassy edges of swamp (Lake Waccamaw), in low, wet, 

 sandy spots along streams (Florence, Wrightsville, Thomasville) 

 and occasional on sandy soil covered with scant grasses and dead 

 oak leaves (Mixon's Hammock). This insect prefers much more 

 swampy situations than does T. lateralis, and the larger series here 

 recorded were only secured by long and careful search in favorable 

 and always much restricted areas. At Florence the following field 

 note was made: "The Tettigidese would often jump into the water 

 and drift down with the current, quite motionless until they would 

 strike a twig or root to which they would cling. Their appearance 

 was exactly like a bit of twig or bark floating down stream. " The 

 species has been recorded from Staten Island, New York, south to ex- 

 treme southern Florida and westward as far as Riverside, Illinois; 

 Howe, Oklahoma, and Dallas, Texas. 



Radinotatum brevipenne brevipenne (Thomas). 



South Carolina. Macon, V, 1 d\ 1'9, [U. 8. N. M.]; 



Yemassee IX 4 1911 (R & H ) V1I > 30 ' 1913 ' (R " & H) ' 1 <?> 



" iuv % 4 iuv 9 2 jUV - <*•' 2 J uv - 9 • 



- JUV - <?, * Juv. 9. Igle of Hope; IX 3j 1911> (R & H); 



r, 4 juv. d\ 



heor S ia - Sandfly, IX, 3, 1911, (R. & H.), 2 



Augusta, VII, 29, 1913, (R. & H.), juv. d". 



5 juv. d\ 3 juv. 9 . Jesup, IX, 1, 1911, (R. & H.i, 2 juv. d\ 



Warm Springs, 850-1,200 feet, VIII, 1 juv. 9 ; XII, 1908, (H.), 1 juv. J 1 , 



9-10, 1913, (R.), 5 juv. d% 9 juv. 9 . 1 juv. 9 . 



