JANUARY, 1902. PLACE MODES OF ACRIS GBYLLUS FOR MADISON, WIS. 81 
RED 
GREEN 
LITTLE 
MEDIUM 
MUCH 
LITTLE 
MEDIUM 
MUCH 
c? 27 m. m. 
$ 25 m. tn. 
? 27 m. m. 
c? 23 m. m. 
3 24 m. m. 
$ 26 m. m. 
¥ m. m. 
3 24 m. m. 
$ 27m.m. 
25 m. m. 
3 22m.m. 
$ 25 m. m. 
$ 21 m. m. 
27 m. m. 
3 23 m. m. 
24 m. m. 
3 24 m. m. 
c) m. IXI. 
d' 24 m. m. 
S 22 m. ra. 
3 22 ra. m. 
23 ra. ra. 
c? 23 ra. m. 
3 27 m. ra. 
$ 24 m. m. 
$ 24 ra. m. 
^ 24 m. ra. 
<^ 26 m. ra. 
3 27 ra. ra. 
? 26 m.ra. 
^ 25 m. ra. 
3 23 m. m. 
2 28 ra. m. 
^ 23 m. m. 
27 m. ra. 
8 
3 
12 
6 
1 
5 
Beneath the color is ashy white ; at times very pale yellow 
on the throat. The throat is generally more or less speckled with 
dusky or brown. (See Plate.) 
The lower jaw is pale or exhibits a few dark specks at the 
symphysis. The ventral surface of the arm shows no black 
blotches, and the thigh, leg and tarsus are also destitute of black 
markings ventrally, though posteriorly two or three transverse 
ones. 
A black spot is frequently visible over the vent, and a dark 
bar either continuous or interrupted passes along the posterior 
thigh as a femoral stripe. 
Tuberosity : As stated, the dorsal part of the frog is more or 
less covered with warty elevations. Within the dark triangle on 
the head which was taken as an index for the general tuberosity 
the elevations varied from 9 to 32 (exolnding one of fifty), with 
a mode of 15-18. (Poly. H.) 
The lower parts are covered by depressed granulations extend- 
ing half way up the side, and on the inferior face of the thigh. 
Two large granules are conspicuous beneath the vent. 
Color Changes : The rapid color changes attributed to these 
frogs by various authors as Dr. Hay, Cope and Le Conte were 
not observed in individuals which we had in confinement in the 
laboratory for some time, the only noticeable change being a 
fading or increase of the ground color, the bands of green or red 
remaining permanent. 
In formalin preservative the color fades into a dark ashy 
gray, the green bands disappear and assume the normal ground 
color, or can be distinguished as a darker band. The red bands do 
not undergo this change, or only to a slight degree, in either case, 
however, the bright luster of the living animal is entirely lost. 
