ABT. 14 NORTH AMERICAN' COPEPODS MARSH 9 



tions will show its presence in other localities in northern Canada 

 and at high altitudes farther south. The occurrence of this species 

 in America is of special interest, as it is the first instance of a species 

 of Diaptomus being found in both the Eurasian and American con- 

 tinents. 



DIAPTOMUS BAKERI Marsh. 1907 



D. hakeri has been found in only two localities, both in the State of 

 California, Stanford University and Monterey. 



DIAPTOMUS BIRGEI Marsh. 1894 



D. hirgei was first found near New Lisbon, Wis. Since the original 

 description in 1894 it has been found in Eagle Lake, near Warsaw, 

 Ind. ; in Richmond, Ind. ; Cold Spring Harbor, on Long Island ; sev- 

 eral localities in the immediate yicinity of Washington, D. C; by 

 Coker, 1926, in lakes at the headwaters of the Catawba, N. C., and 

 has been reported by Klugh, 1926, at Barriefield, Ontario, and St. 

 Andrews, New Brunswick. The distribution is shown in Figure 1. 



DIAPTOMUS (MONOCULUS) CASTOR Jurine, 1820 



D. castor is widely distributed in Europe and has been reported by 

 Stephenson, 1913, and Haberbosch, 1920, on the western coast of 

 Greenland. Its distribution is shown in Figure 1. It does not occur 

 on the continent of America. 



DIAPTOMUS CLAVIPES Schacht, 1897 



This species was first described from material collected in the 

 Okoboji Lakes in northwestern Iowa. Brewer, 1898, found it in tem- 

 porary pools in Nebraska, calling it D. nehraskensis. Beardsley, 

 1902, reported it from Greeley, Colo. The author found it at Hugo, 

 Colo., and in lakes near Pikes Peak, in the same State. Dodds, 1908, 

 1915«, 1917, 1920, 1924, reported it from La Junta and several other 

 localities in Colorado. A letter to the author from C. I. Alexander 

 stated that he had found it near Fort Worth, Tex. The distribution 

 is shown in Figure 2. 



DIAPTOMUS COLORADENSIS Marsh. 1911 



Z>. coloradensis was originally described from material collected at 

 Mount Carbon, Kremmling, Corona, and Tolland, Colo. It occurred 

 in a number of small bodies of water near Mount Carbon. Later it 

 was repeatedly found by the author near the Salina Experiment Sta- 

 tion of the United States Department of Agriculture in Utah, and 

 in the summer of 1928 it was found in the lake at Palisade Park, about 

 6 miles south of Manti, Utah. All of these locations except the last 

 are 8,000 feet or more in altitude; Palisade Park is 5,900 feet. It 



33073—29 2 



