THE MYRIAPODA OF NORTH AMERICA. 103 



long, extending' to the ninth segment, articles 20, long. Ocelli 10. in < 

 transverse series. Prosternal teeth 9+0. Coxal pores, S, s, s, 7, large, 

 transverse. Spines of the lirst pair of legs, 1. .'>, 2; of the penultimate 

 pair, 1, 3, 3, 2; of anal pair, 1, 3, 2. 



Female: Claw of genitalia wide and short, tripartite: spines 2+2, 

 short and stout, ends tlattened and obscurely serrate. Length, 25""". 



This species is described from a female specimen, which has the fourth 

 segment considerably angnlated, and I at first placed it in a new sub- 

 genus. But a study of multidcniatus showed that the angnlatiou of 

 the fourth dorsal plate was subject to considerable variation. 



This is the only North American species of the subgenus nlithol>iux 

 that has thecoxal pores in a single series, and in this respect approaches 

 L. raliilux of Europe ; but that species has 40-48 antennal joints. Ace. 

 1!>542, 21 contains a female of this species. 



44. Lithobius multideiitatus Newport. Mnrksvillc ,-mcl .Natural IJri<lj;f, \'a. ; L. 

 M. Underwood. 



INDIANA UNIVERSITY, Jteccmber 1, 



