ATOPETHOLID MILLIPEDS — HOFFMAN AND ORCUTT 137 



General color typically shining black with a narrow, typically ferruginous but 

 sometimes nearly white, pale line along caudal border of each segment, the collum 

 having an anterior ferruginous border as well. Legs from dark brown to fuscous 

 or black. 



Discussion: This species appears to be synipatric with A. cali- 

 fornicus, both having been recorded by Chamberhn (1953) from Los 

 Angeles. The following statement from the original description of 

 A. angelus indicates a way of distinguishing males of the two species: 



Posterior apophysis of telopodite of anterior gonopods [of angelus] in ventral 

 view longer and more slender [than in cahfornicus], not expanded distally; the 

 distomesial angle of telopodite more prominent, often meeting its mate in the 

 middle line. Telopodite of posterior gonopods distally more strongly uncate. 



The term "posterior apophysis" is referred to in this paper as the 

 accessory process of the anterior telopodite. 



Distribution: Known thus far only from Los Angeles County, 

 California. It has been reported in the literature from Edendale 

 suburb and from Reservoir Hill, both at Los Angeles. An additional 

 collection has been studied consisting of a male with 40 segments from 

 the San Juan Hills, 2 miles west of Spadra, Los Angeles County, 

 California, collected in June-July 1943 by D. D. Davis (Chicago Nat. 

 Hist. Mus.). 



Atopethohis barbaraiit's Chanil)erlin 



Atopetholus barbaranus Chamberlin, 1919, p. 168 (male holotype in the Chamber- 

 lin collection, from Orcutt, Santa Barbara County, California, date and col- 

 lector not stipulated). 



The original description states: 



The species may be readily distinguished from the others thus far known in 

 having the distal end of the posterior gonopods with its posterior border straight, 

 not rolled in or recurved. The two fingers of the anterior gonopods are char- 

 acteristically long, slender, and divergent. The coxites of the anterior gonopods 

 moderately extending beyond the sternite. 



The holotype is said to have 48 segments, with a length of 40 mm. 

 and a diameter of 5 mm. The following remark is also made: 

 "Sternite of the third gonopod with the usual process." What is 

 meant by this remark, we cannot imagine. 



Atopetholus californicus Chamberlin 



Atopetholus californicus Chamberlin, 1918, p. 168; 1940, p. 82, fig. f; 1953, p. 138 

 (male holotype, Mus. Comp. Zool., from Claremont, California, collected by 

 W. A. Hilton). 



This species is stiU poorly known and unfortunately the type speci- 

 men can no longer be found at the Museum of Comparative Zoology. 

 The original description describes only the external features of the 

 species; a subsequent reference contains a small sketch of a gonopod 



