5<3 UNIVERSIXY OF COLORADO STUDIES 



attached to plants or debris in the water near the shore. If conditions 

 are favorable the salamanders mature in a single season, the adults 

 leaving the water late in August. This salamander feeds on insects, 

 insect larvae, worms and small Mollusca. Although popularly 

 believed very dangerous, this species is quite harmless. 



Colorado specimens. — University Museum: Meeker, August 16, 1909 

 (135 mm.), A. H. Felger, No. 64; Ohio City, July 4, 1911 (125 mm.), F. Rohwer, 

 No. 133; Boulder, March 28, 191 2 (222 mm.), E. Miller, No. 177; Tolland, July 

 27, 1911 (6 specimens, 120-200 mm.), F. Ramaley, No. 178; Colorado Slate His- 

 torical and Natural History Museum: Denver, September 10, 1892 (5 specimens, 

 100-150 mm.), H. G. Smith; Denver, August 9, 1900 (220 mm.), W. C. Ferril; 

 Denver, August 10, 1900 (160 mm.), W. C. Ferril; Denver, August 18, 1900 

 (140 mm.), W. C. Ferril; Denver, July 18, 1902 (120 mm.), W. C. Ferril; Denver, 

 July 24, 1904 (255 mm.), David Bellrose; Denver, August 31, 1904 (250 mm.), 

 Mrs. N. P. Nelson; Denver, October 3, 1905 (no mm.), Guy Bradbury; Denver, 

 October 24, 1905 (180 mm.), F. A. Richardson; Broomfield, December 13, 1905 

 (270 mm.), William Ireland; Denver, October 24, 1907 (150 mm.), Richard 

 Johnston; Stale Teachers' College Museum: Trinidad, A. E. Beardsley; Cache la 

 Poudre, A. E. Beardsley; Alexander Lakes above Delta, and Durango, A. E. 

 Beardsley; reported by Cockerell from Boulder, October 7, 1907, by Ramaley 

 from Redrock Lake, near Ward, and from Beaver Reservoir, Boulder County. 

 General reports show this species to be very abundant over the state. 



Order SALIENTIA 



Four of the five families of this group known from North America 

 are represented in Colorado. The following key will distinguish 

 them. 



A. Parotoid glands present, usually large and prominent; terrestrial. 



B. Pupil of the eye vertical; upper jaw with teeth ; parotoids not promi- 

 nent in some species. 



Family Pelobatidae, the Burrowing Toads (page 51). 

 BB. Pupil of the eye round or horizontal; skin with large warts; jaws 

 toothless. . . . Family Bufonidae, the true Toads (page 52). 

 AA. Parotoid glands wanting; most of the species semi-aquatic. 



C. Tips of the digits more or less expanded into adhesive disks for climb- 

 ing; size rather small. Family Hylidae, the Tree Frogs (page 56). 



CC. Tips of the digits not expanded into adhesive disks; size medium to 

 large Family Ranidae, the Frogs (page 59). 



