22 IOWA STUDIES IN NATURAL HISTORY 
oak woods between Robinson and Marble Lakes in Spirit Lake 
Township on July 15. In one specimen the heel when extended 
forward reaches the anterior border of the tympanum; in the 
other the posterior border. 
Hyla versicolor versicolor Le Conte.—Tree Frog.—A single 
adult was found under the loose dry bark of a dead oak in the 
dense woods along the Little Sioux River in Okoboji Township, 
June 20. Five young ones, four with tails and one without, 
were found while seining a woods pond covered with duckweed 
between Marble and Hottes Lakes in Spirit Lake Township on 
July 28. Other records for this county are: Center Lake 
region, July 22, 1918, and Lake Okoboji, July 1914, T. C. Ste- 
phens (Ruthven, 1919, 2). 
Acris gryllus (Le Conte).—Cricket Frog —Common but not 
abundant. It was found in nearly all suitable localities; the 
muddy shores of the Little Sioux River in Okoboji and Lake- 
ville Townships, open shores along the canal and on Miller’s 
Bay in Lakeville Township, open borders of small ponds or 
sloughs, and along Lower Gar Lake in Center Grove Township. 
Rana pipiens Schreber.—Leopard Frog.—This is the wide- 
spread and abundant amphibian of the region. Specimens were 
taken in all the townships visited. It occurs near all the lakes, 
sloughs, and streams, and is common in tall, and sometimes in 
short grass, on the prairies and uplands far from water. It is 
rare, however, in the woods. Young frogs, just metamorphosed, 
were exceedingly numerous on July 14 and 15 in Spirit Lake 
Township, between Marble and Hottes Lakes, near their breed- 
ing ponds, but even two weeks later tadpoles with only the hind 
legs developed were still plentiful in the ponds. Several indi- 
viduals, both young and old adults, were found with no spots on 
the body and those of the legs much reduced. 
Plestiodon septentrionalis Baird.—Skink—Not common. A 
single specimen was taken on the Laboratory grounds on June 
25. It was first found on Lake Okoboji by Dr. T. C. Stephens 
in July, 1914. 
Heterodon nasicus Baird & Girard.—Western Hog-nosed 
Snake; Spreading Adder; Blow-Snake.—Apparently rare in the 
county. One specimen was found by Professor Stromsten, on 
