72 COOK 



Bering Island, July-August, 1897 (Dr. Stejneger, Mr. Barrett-Ham- 

 ilton) ; Copper Island, August, 1897 (Mr. Barrett-Hamilton). 



This species belongs to the subgenus Archilithobius, and seems to 

 have not very distant relatives among several species described from 

 Siberia by Stuxberg. This larger suite of specimens shows consider- 

 able variation in color, some individuals being quite deep purplish-red, 

 while others are rather light brownish. Females of both colors were 

 examined, and the shape of the genital forceps seemed to be identical. 



LITHOBIUS SULCIPES Stuxberg. 



Lithobius sulcipes STUXBERG, Ofv. vet. Akad. forh., 21, 1876. BOLLMAN, 

 Bull. 46, U. S. Nat. Mus., p. 199, 1893. 



Bering Island. Taken in 1883 by Dr. Stejneger. 

 Order Epimorpha. 



ANALYTICAL KEY TO THE SUBORDERS OF EPIMORPHA. 



Segments 21 or 23 ; not all provided with spiracles. 



Suborder SCOLOPENDROIDEA. 

 Segments 31 and upward; spiracles in a continuous series. 



Suborder GEOPHILOIDEA. 



Suborder SCOLOPENDROIDEA. 



The more conspicuous representatives of this group are the large 

 tropical centipedes, but there are numerous genera of small Scolopen- 

 droidea, some of which are native in temperate regions. The genus 

 Cryptops is widely distributed in both hemispheres, and will probably 

 be found in the Northwest. 



Family SCOLOPOCRYPTOPID^E. 

 Genus Otocryptops Haase. 



Otocryptops HAASE, Abh. Ber. Zool. Anthrop. Mus. Dresden, No. 5, p. 96, 

 1887. 



This genus was separated from Scolopocryptops Newport because of 

 the absence of spiracles from the seventh segment. The type is O. rubi- 

 ginosa (L. Koch), a native of China and Japan not remotely related 

 to the following widespread North American species. Haase looked 

 upon Otocryptops as a distinctively Asiatic genus, but it seems rather to 

 have originated in America, where other species of Otocryptops and 

 all the related 23-segmented Chilopoda are found. Of the latter there 



