AMPHIBIANS-REPTILES, DICKINSON CO. 21 
known from a little farther south, are not expected: Coluber 
constrictor flaviventris, Lampropeltis getulus holbrooki, Stor- 
eria dekayi, Thamnophis proximus, and Natrix sipedon sipe- 
don. 
The following amphibians and reptiles were taken by the 
writer (unless otherwise stated) in 1920 in Dickinson County, 
Iowa, and are deposited in the Museum of Zoology of the Uni- 
versity of Michigan at Ann Arbor. 
Necturus maculosus (Rafinesque).—Mud Puppy.—One speci- 
men was seined from a pond near Hottes Lake in Spirit Lake 
Township on August 7 by Drs. Kuntz and Thomas. This speci- 
men was shipped to me by Professor Stromsten who declares 
there can be no doubt about its being a Necturus, but was 
spoiled and destroyed before I was able to see it. It is prob- 
able that another specimen was taken in the outlet from Spirit 
Lake a year earlier, but this also was eventually lost. 
Ambystoma tigrinum (Green).—Tiger Salamander.—Com- 
mon throughout the region. One adult was taken in a damp 
cess-pool on the Laboratory grounds on July 5. Larvae in all 
stages were plentiful in several of the small ponds in pastures 
and fields, and at least one specimen was found in nearly every 
pond seined. In a very small pasture pond by the side of the 
road north of the Laboratory 160 specimens were taken with a 
seine in lessthan an hour. In this as in other ponds where they 
were common, they were found to be much more plentiful to- 
wards the center of the pond, away from grass and algae. 
Bufo americanus Holbrook.—American Toad.—Common but 
not abundant in the county. Eight adults were taken, four 
near the Laboratory, one on the north shore of West Lake Oko- 
boji, one on the shore of Upper Gar Lake, and two on the banks 
of the Little Sioux River. Young individuals were found 
transforming in a marsh near the shore of East Lake Okoboji 
on July 8, and several others, about a centimeter and a half in 
length, on the grassy mud-flats of Lower Gar Lake on July 17. 
Pseudacris triseriata (Wied).—Swamp Tree Frog.—Two 
adults were found, one on a rainy day, July 7, in the tall grass 
of a wet meadow between Miller’s and Emerson’s Bays, West 
Lake Okoboji, and the other in the sparse undergrowth of an 
