THE MYRIAPODA OF NORTH AMEIilCA. 25 



Ratlier robust, smooth; sparsely hirsute, more densely beneath. 



Head obcordate, h)njrer than wide (7:0); modeiately sm<M)th ; sparsely 

 l>ih)se. 



Antenna' short, joints IJO, n<>t as short as in the precedinjif; the last 

 joint loni;^ and sharp. 



Ocelli moderate, 10-lli, in o series. 



Prosternal teeth 4, small and indistiiu-t. 



Coxal iM)resli, 2, L', 2-3, 4, 3, 3, moderately large and round. 



Spines of the first pair of feet 1, 2, 1-1, 3, 2; jKMiultiinate 1, 3, 3, 1-1, 

 3, 3, 2; last pair 1, 3, 3, 0-1, 3, 3, 1. 



Posterior i)air of feet ratlier short, not swollen. 



Claw of the female genitalia tripartite, the middle lobe by far longer 

 than the others, which are small and indistinct; spines short and ro- 

 bust, the inner shortest. 



Length of body 1)-11"""; last pair of legs 3'"'". 



Habitat. — Bloomington, Ind. 



I have over a dozen specimens of this species. 



7. Lithobius trilobus, «]». nov. 



Brown; head and the last 3-4 segments darkest; feet and ventral 

 laminie gray brown; tip of antenn;e and prehensorial feet chestnut. 



Kather slender, but wide and thin, modeiately smooth; sparsely 

 pilose, the ventral lamina* more densely. 



Head obcordate, a little longer than wide ((i. 5: (i. 2); nearly smooth; 

 sparsely i)ilose. 



Antenna' short, joints 20, mostly short, the last moderately l<mg and 

 blunt; densely pilose. 



Ocelli lS-25, arranged in 7-<S series. 



Prosternal teeth 4, small andindistinct. 



Coxal pores 3, 4, 4, 3-4, 5, 5, 4, large and round. 



First pair of feet armed with 1, 3, 1 si)ines; penultimate 1, 3, 1, 0-1, 

 3, 2, 1; lastpair 1,3, 1, 0. 



Posterior i>air of feet moderately long, not swollen; in the male the 

 fifth joint is produced into a short lobe on the inner side. 



Claw of the female genitalia wide, tripartite, the middle lobe not 

 much longer than the others; spines rather short and stout. 



Length of body 10-12"""; lastpair of legs 3.5""". 



Habitat. — Bloomington, Ind. 



This si»ecies is described from a number of specimens. 



It is easily distinguished from the preceding by the claw of the 

 female genitalia and by the greater number of ocelli. 



8. Lithobius cardinalis, sp. qov. 



Brown; head, tip of antenna', and last pair of legs chestnut; ventral 

 lamina? and feet light. 



Slender, smooth ; sparselj' pilose. 



Head large, subcircular, wider than long (7:6); sparsely pilose. 



