248 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 42. 



Hocketts Lake, California (in Kern River region): 



No copepod8, but from other collections from Hocketts Lake were identified — 

 Cyclops albidus Jurine. 

 Cyclops serrulatus, var. montanus Brady. 

 Diaptomus signicauda Lilljeborg. 



Wliile most of the localities are new for the species, in the majority 

 of cases no special significance is to be attached to the new facts of 

 distribution. Cyclops hicuspidatus, C. leuckarti, C. albidus, C. ser- 

 rulatus, and C. prasinus occur not only all over the United States, 

 but are common in Europe and Asia, while some of these species 

 extend their range to Africa without any change of structure. C. 

 viridis in its varieties hrevispinosus and americanus occurs every- 

 where in the United States. The localities for Epischura nevadensis, 

 Diaptomus asJdandi, and D. tyrelli are not new. The localities of the 

 other species, however, are of particular interest and justify the more 

 extended statement following. 



DIAPTOMUS LEPTOPUS, var. PISCINA Forbes. 



This variety was originally described from collections made in 

 Montana. It has also been found in Manitoba, Alberta, and Colorado. 

 Diaptomus leptopus has seemed to be confined largely to the Missis- 

 sippi Valley, although it has been reported from Massachusetts. 

 Diaptomus leptopus, var. piscinse has not before been reported from 

 the eastern United States, so that its occurrence at Woods Hole is a 

 matter of some interest. 



DIAPTOMUS DORSALIS Marsh. 



This species was first found in collections made by Prof. E. A. Birge 

 in southern Louisiana, and up to the present time this has been the 

 only locality for the species. Its occurrence, therefore, in great num- 

 bers in the collections made in Florida is of importance as extending 

 the range of the species, because without doubt it will be found at 

 intervening points. It was found in Little Lake George, Lake Monroe, 

 and in the St. Johns River as far down as Palatka. 



DIAPTOMUS REIGHARDI Marsh. 



Specimens of this species were found in the collections made by 

 Mr. A. C. Weed in Sodus Bay, New York, July 26 and August 9, 1909. 

 These specimens are of much interest. D. reighardi was described 

 from material collected from a lake on Beaver Island in Lake Michi- 

 gan, and from Intermediate Lake, in the northern part of the southern 

 peninsula of Michigan. It was later found in collections made by 

 Dr. K. H. Ward in Crooked Lake, Michigan. Although extensive 

 collections have been made in the other lakes of Michigan and in Lake 

 Michigan, it has never been found in any other locality, and the suppo 

 sition has been that it was a rather closely localized species. From its- 



