61 



Genus CHOROPHILUS, Baird. 



Chorophilus, Baird, 1854, 1, 59; Boulenger, 1882, 27, 332; Cope,, 

 1889, 31, 331 ; Hekecetes, Baird, 1, 1854, 59. 



Fingers free from web. Toes with little or no web. Digital disks 

 all small, but the phalanx with a strong claw. Vomerine teeth present. 

 Tongue round or oval, slightly notched behind. Tympanic disk distinct. 

 Sacral vertebra with its transverse process slightly expanded. 



This genus contains some six species, all except one belonging to North 

 America. 



Key to the North American Species of Chorophilus 



A. Upper jaw projecting beyond the rounded lower ; profile pointed. 



Width of head in length of head and body 2.5 to 2.66 times;,: 

 nostrils half way from tip of snout to eye. Texas. ornatus. 



Width of head in length 3 to 3.5 times ; nostrils nearer tip oF 

 snout than orbit ; no subarticular tubercles. Georgia to Texas,^ 



occidentalis. 



Width of head in length 2.8 to 3.66 times ; subarticular tubercles^ 

 well developed ; upper surface usually with 3 to 5 dark stripes^ 

 or rows of spots ; nostrils nearer tip of snout than orbit. 

 Eastern United States. nigritus, p. 61. 



B. Upper jaw not projecting beyond the almost V-shaped lower ; 



profile truncated ; length two-thirds inch. South Carolina. 



oculari»i' 



Chorophilus nigritus, (LeConte). 

 Striped Tree-frog. 



Variety, nigritus. Rana nigrita, Leconte, 1825, 62, 282 ; Cystignathus 

 nigritus, Holbrook, 1842, -5^, iv, 107, pi. 26 ; Chorophilus nigritus, Baird,. 

 1854, 1, 60 ; Boulenger, 1882, 27, 333 ; Cope, 1889, 51, 337, with figures. 



Variety, /mantjH. Helcecetes feriarwn, Baird, 1854, 1, 59 ; Chorophilus 

 feriarum, Cope, 1889, 51, 339, with figures. 



Variety, triseriatus. Hyla triseriata, Wied, 1839, 63, 249 ; Chorophilus 

 triseriatus, Cope, 1875, 12, 30 ; 1889, ol, 342 ; C. septentrionalis, Bou- 

 lenger, 1882, 27, 335, pi. 23, fig. 1. 



Length of head and body seldom exceeding an inch and a quarter. 

 Head having its length equal to its breadth or greater. Tympanum 

 distinct, about one-half the diameter of the eye. Tongue emargiuate 

 behind. Vomerine teeth between, or slightly behind the choanoe. 

 Males furnished with a conspicuous gular sac, which is capable of con- 

 siderable inflation, and opening into mouth by a slit each side the base 



