Strecker—N otes on the Robber Frog. 75 
ever, is the same as that of adult examples. Attains a 
length of 3144 inches. An example collected April 13, 
1910, had the ground color of the upper surfaces a beau- 
tiful pearl gray. 
Hasrrat ASSOCIATIONS. 
The Robber Frog has been observed by the writer in 
two similar localities in the vicinity of Waco :— 
(1) Flat Rock Creek, McLennan County (Hewitt Sec- 
tion, altitude 625 to 655 feet), an intermittent stream 
flowing through a stretch of prairie land. Banks of soft 
shaly white limestone, filled with cavities and fissures. 
Large fragments have been broken loose from the bluffs 
from time to time and strew the bed of the stream. Sev- 
eral trips have been made to this place and in each case 
the same species of reptiles and amphibians have been 
obtained. The most characteristic reptile is an iguanian 
lizard—Holbrookia texana Troschel—which is equally 
abundant on the bluffs and among the rocks below them. 
Numerous examples of Long’s Garter snake, Hutaenia 
proxumma Say, and the diamond-marked water snake, 
Tropidonotus rhombifer Hallowell, haunt the neighbor- 
hood of the deeper water holes, where they find abundant 
food—Leopard Frogs, Cricket Frogs, and small fishes. 
Two species of Toads, Bufo valliceps Weig. and Bufo 
americanus Le Conte (large dark type), scorpions, 
Buthus, and large ground spiders are found in fissures in 
the banks and in hollows under the larger rocks. Whip 
Snakes, Zamenis flagellum Shaw, of the pale prairie type 
resort here in numbers for the purpose of feeding on the 
lizards and the large grasshopper, Schistocera americana, 
which forms their principal food. The following species 
of mollusks are abundant: Polygyra roemert Pfr., Poly- 
gyra texasiana Mor., Bulimulus dealbatus mooreanus 
Pfr. The rocky bluffs are low, averaging less than a 
dozen feet. 
(2) Nameless Gully, three miles north of Waco, head- 
ing near Walker’s Crossing on the Bosque River. Banks 
of soft shaly limestone, interspersed with stretches of 
