644 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xx. 



Family ASTACLD.E. 



' Subfamily ASTACIN^E. 1 

 Genus CAMBARUS Erichson. 

 Cambarus Erichson, Arch. f. Naturgesch., 12ter Jahrg., I, p. 88, 1846. 

 Type, Astacus bartonii Fabricius. 

 GROUP I. (Type, Astacus blandingii Harlan.) 



Third segment of third and fourth pairs of legs of male hooked. 

 Outer part of first pair of abdominal appendages of male truncate at 

 the tip and furnished with one to three small recurved teeth ; inner part 

 ending in a short acute spine, which is commonly directed outward. 



CAMBARUS BLANDINGII ACUTUS (Girard). 



Specimens of this Southern and Western form of C. blandingii have 

 been received through Professor S. E. Meek from Kainister and Good 

 Land, Indian Territory, Mammoth Spring, Batesville, and Camden, 

 Arkansas, and Arthur (Red River), Texas. There are specimens in the 

 United States National Museum from Corpus Christi, Texas, and from 

 Portage River, at Oak Harbor, Ohio. Mr. W. P. Hay 2 has recorded 

 this form from the following new localities in Indiana: Turkey Lake, 

 Kosciusko County; Lake Maxinkuckee, Marshall County; Kankakee 

 River, Lake County; Terre Haute, Vigo County. 



Specimens procured by Professor Meek at McAlister, Indian Terri- 

 tory, are peculiar. The rostrum is narrower, more deeply excavated, 

 with more convergent sides than in typical specimens of C. b. acutus. 

 The rostral acumen, too, is longer, surpassing the antenmilar peduncle, 

 the lateral spines more prominent. The rostrum approaches the form 

 seen in the Eastern G. blandingii, or even more nearly that of the typ- 

 ical G. clarMi from Texas. 



CAMBARUS FALLAX Hagen. 



Eustis, Lake County, Florida (Coll. U.S.N.M.); Gainesville, Alachua 

 County, Florida (Coll. Mus. Comp. Zool.). 



CAMBARUS CLARKII Girard. 



There is a fine series of specimens in the United States National 

 Museum, collected in Las Moras Creek, Kinney County, Texas, by F. A. 

 Clark and E. A. Mearns, in 1893. As in the specimens collected by 

 Edward Palmer at San Antonio, Texas, and described on page 26 of 

 my "Revision of the Astacidse," the areola, although very narrow, is 



1 Same as Family Potamobiidce Huxley=Subfamily Potamobiince Faxon. Potamobius 

 being a synonym of Astacus (see p. 662), the subfamily name should be Astatine?. 



2 The Crawfishes of the State of Indiana. By W. P. Hay. 20th Ann. Rep. Dept. of 

 Geology and Natural Resources of Indiana, pp. 475-507, 1896. 



