59 



eye. Tougue free behind, rounded and slightly notched. Vomerine 

 teeth in two patches, a little behind the choana?. Males furnished with* 

 a large gular sac, which opens into the mouth by a slit each side of the 

 tongue. Fold of skin on the breast conspicuous or not. Fingers and- 

 toes with well-developed discs. Fingers entirely without webs. Toes 

 half webbed. Hinder limb, when pressed to side, bringing the heel tO' 

 the eye. Two distinct tubercles on the heel ; subarticular tubercles^ 

 present. Skin nearly smooth above, granulated on the chest, belly and' 

 the under surface of the thigh. 



Color above varying from ash to brown and reddish. On the back is 

 an X of narrow dusky lines, these beginning at the eyes and terminating 

 on the sides just before the insertion of the thighs. On each side of the 

 body, opposite the intersection of the lines of the X, begins another 

 dusky line, which runs parallel with the corresponding line of the X. 

 Between the eyes is a very open V. A dusky band runs from the snout 

 to the eye, and seems to be continued over the tympanum and the fore 

 leg, and fades out along the side. Edge of the upper lip pale, but 

 mottled Avith dusky. Some specks of brown on the breast and throat. 

 Gular sac of male brown, at least in the spring. Fore legs of the color 

 of the body, and with indistinct bars. Thighs mottled, tibise barred,, 

 feet mottled. The young frogs, with bodies three-fourths of an inch in> 

 length, are of a fine straw color, with the usual brown markings. 



Length a little over one inch. 



Known to occur from Maine {18, 101) to Manitoba and south to Soutle 

 Carolina and Indiana. Specimens of this frog have been taken in the- 

 vicinity of Bloomington by the late Charles H. Bollman. Professor 

 Blatchley reports having taken four specimens at Terre Haute, and there 

 was a specimen from there in the Normal School collection. I have it 

 also at the hands of Mr. A. B. Ulrey, from North Manchester, Wabash 

 County. I have also received a specimen from Brookville, at the hands 

 of Mr. Ed. Hughes. It will, no doubt, be found ultimately in all por- 

 tions of the State. 



Prof. Cope states that this is our most abundant species of Hyla, but 

 that it is more generally known by its voice than by its appearance' 

 " After the rattling of the Acris gryllus in the marshes and river banks is 

 fairly under way, during the first bright days of spring, the shrill cry or 

 whistle of this little creature begins to enliven the colder swamps and 

 meadows of the hill country. Difierent individuals answer each other 

 with difierently toned voices of a single note. This is exceedingly shrill 

 and loud ; the muscular force employed in expelling the air from the 

 lungs seems to collapse the anim.al's sides till they nearly meet, while the 

 gular sac is distended with each expulsion to half the size of the head and 

 body together. They are chiefly noisy in the end of the afternoon, but 

 in shady situations or on dark days may be heard through the morning 



