24 PROCBEDIITGS OF THE NATIONAL MUSEUM vol.72 



Type.— C^t. No. 980, U.S.N.M. 



Several mature specimens "numerous with young under pile of 



rotting lumber " collected 14 miles up the north fork of Feather 



River from Belden, Plumas County, Calif., December 25, 1922, by 



H. S. Barber. 



Genus BRACHYCYBE Wood 



This genus has been treated by several writers as a synonym of 

 PlatydesTRUs^ but not correctly. As pointed out by Pocock in the- 

 Biologia Centrali Americani, the closely placed coxae and large,, 

 erect intercoxal lobes of Brachycyhe at once distinguish it from the- 

 tropical Platydesmus. 



After Wood's description of Brachycyhe in 1864, with leconteiy 

 an eastern species, as the type, two other species were named from 

 California — B. rosea, by Murray in 1877, and B. {PlatydesTnus) 

 califomicus, by Karsch in 1880. In 1893 BoUman, comparing 

 specimens of leoontei with the descriptions of the two California 

 millipeds, was not able to find that differences existed between any 

 of the three species and so included the latter two as synonyms of 

 le^contei. 



While Murray's description was extremely short and lacking 

 in details, nevertheless he seemed to imply that his species differed 

 from Wood's in the number of segments, for he said of rosea " the- 

 segments numerous (in other species 47 in number)," Wood having 

 given 47 segments as the number for lecontei. The larger number 

 of segments indicated by Murray for his species seems sufficient to- 

 separate the Pacific coast form from the eastern lecontei, so that 

 rosea may be recognized as a valid species, and a short description 

 is included, from specimens collected by Mr. Barber in Pluma& 

 County. 



The characters used by Karsch in describing his species are noL 

 sufficiently definite for the separation of his species from either 

 lecontei or rosea, so that calif ornicus is placed as a synonym under 

 rosea. 



BRACHYCYBE LECONTEI Wood 



Brachycpie lecontei Wood, Proc. Phila. Acad. Nat. Sci., p. 187, 1864. 



This species is known from Georgia and Tennessee, and BoUman ® 

 reported it from Arkansas. 



BRACHYCYBE ROSEA Murray 



Brachycyle rosea Mueeat, Econ. Ent. Aptera, p. 21, 1877. 

 Platydesmys califomicus Kaesch, Mitth, Munch. Ent. Ver., p. 144, 1880. 



Description. — Number of segments from 62 to 66. Body of the 

 largest specimen examined 23 mm. long and 3 mm. broad. 



° Ent. Amer., vol. 4, p. 1, 1888. 



