134 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



than long (8:7). Antennae moderate, joints 25-29, joints short, rather 

 densely hirsute. Ocelli 9-12, in 4 or 5 series. Prosternal teeth 10 or 12, 

 rather small and not sharp. Coxae pores 4,5,5,4 or 3,4,4,3, round. 

 Spines of the first pair of feet 2,2,1; penultimate pair 1,3,3,2 or 1,3,2,1; 

 last pair 1,3,3,2 or 1,3,3,1. Posterior feet moderate. Claw of the 

 female genitalia whole, rather long and slender; spines rather long and 

 slender, of about equal length. Length of body, 13 mm ; breadth, 1.8 mni . 



Habitat. — Bloomin gton, Indiana. 



This species is common under leaves on wooded hillsides; it belongs 

 to the subgenus Archilithobius. 



8. Lithobius cardinalis. 



[Lithobius cardinalis Bollman. Am. Nat., xxi, 81 (1887).] 

 Brown, ventral laminae and feet paler; head fulvous brown, antennae 

 darkest, tip rufous; rather slender, smooth, very sparsely pilose, feet 

 sparsely; cephalic laminae subcircular, wider than long (7:6); antennae 

 moderate, joints 28, small, rather densely hirsute throughout; ocelli 10, 

 in 4 or 5 series; prosternal teeth 4, rather large; coxae pores 3,4,4,3, 

 round; spines of the first pair of feet 0,2,1; penultimate 1,3,3,1; last 

 1,3,3,1; posterior feet rather long; claw of the female genitalia tripar- 

 tite, short and stout; spines robust, sharp, interior shortest. Length of 

 body, 8 mu '; breadth, l ram . 



Habitat — Bloomington, Indiana. 



This species is common; I have taken it most abundantly under 

 boards laid on a thick growth of grass in March and April. It belongs 

 to the subgenus Archilithobius. 



9. Lithobius pullus. 



[Lithobius pullus Bollman. Am. Nat., xxi, 81 (1887).] 



Brown, head darkest, feet and ventral laminae paler; feet sparsely 

 hirsute; cephalic lamina subquadrate, longer than wide (11:10). An- 

 tennae moderate, joints 20, not very short, moderately pilose. Ocelli 

 9-12, in four series. Prosternal teeth 4, moderate. Coxae pores 3,4, 

 4,3, round. Spines of the first pair of legs 1,2,1; penultimate 1,3,2,1; 

 last 1,3,3,1. Posterior feet moderate. Claw of the female genitalia 

 tripartite, the inner lobe larger than the other, spines rather robust, 

 sharp, the inner smallest; in one specimen there are three on one side. 

 Length of body, 10 mm ; breadth, l 1 " 1 ". 



Habitat. — Bloomington, Indiana. 



This species belongs to the subgenus Archilithobius, and is described 

 from nine specimens. 



10. Lithobius trilobus. 



[Lithobius trilobus Bollman. Am. Nat., xxi, 81 (1887).] 



Brown, head light mahogany, feet and ventral laminae pale; feet 

 sparsely pilose and also the last ventral laminae, cephalic lamina sub- 

 cordate, broader than long (7:6). Antennae moderate, joints 20, mostly 



