Strecker—Notes on the Robber Frog. 81 
Scaphiopus couchii 
Oe ae oon aac April 10 to May Permanent ponds, tem- 
30. As late porary pools, water- 
as Julyin dry filled hollows in city 
years. yards. 
Scaphiopus sp.®.......... April 13, 1910. | Temporary pool. 
Rana catesbeiana Shaw April 1 to Waco creek, permanent 
May 10. marshes and ponds. 
Rana pipiens Schreber. ... April 11 to Marshes, ponds, small 
May 15. creeks, 
Rana sphenocephala 
CE a vant ea No date for Waco. 
April 14-15, Deep holes in Paluxy 
1909. creek, Somervell 
County, Texas. 
It must be taken into consideration that many of our 
species breed in temporary pools and that the time of 
their going into the water depends entirely on the amount 
of rainfall we get in early spring. Earlier dates for some 
of the species have been recorded from more northern 
localities, but this discrepancy in dates and latitude is 
something that I am unable to account for. Some frogs 
can stand a comparatively low temperature, but moisture 
is most essential to them under all conditions. In the 
north in early spring the ponds and water-courses are 
filled to overflowing as a result of the winter sleets and 
snows, but in Texas we usually get the greatest amount 
of rainfall early in the autumn and in the months of 
April and May. In the plains country in Western Texas 
(Hale and Garza Counties), Bufo cognatus Say and the 
Tiger Salamander Ambystoma tigrinum Green rarely go 
into the water before July. 
The adult Inthodytes latrans presents a rather unusual 
appearance for a frog, on account of its proportions and 
its peculiar method of elevating the body. Younger 
specimens have much shorter limbs and do not look so 
odd. At times the species is sluggish and rather easily 
captured, but as a rule retreats into caves and fissures 
at the slightest alarm. Its voice is a short dog-like bark 
8 A new species related to the solitary spadefoot (S. holbrookit Harlan) to 
be described later. 
