72 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



sions. Spiracles round, anterior scarcely enlarged, rest nearly equal. 

 First pair of feet short, anterior and posterior subequal, former more 

 robust. Posterior coxae moderately inflated, pilose, pores few (5-6), ar- 

 ranged along the ventral plate, which is wide with the side straight 

 and strongly converging. Pairs of feet of male 43, last moderately 

 thickened, pilose and armed; female 45, last rather slender, less pilose 

 than male, armed. Length of body 18.5-21.5 mm ; width, 0.7-l B 



mm 



Habitat. — Salem, Indiana. 



I have examined a male and a female. 



Subgenus Archilithobius. 

 Lithobius holzingeri, sp. now 



Chestnut brown, head dark, antennae and feet paler. Eobust, smooth, 

 sparsely pilose; head subrotund, somewhat wider than long. An- 

 tennae moderately long, joiuts 20-28, long. Ocelli 15-20, arranged in 

 5 or 6 series. Prosternal teeth 4. Coxal pores 3, 4, 7, 3-5, G, 1, 5, some- 

 what traverse, large. Spines of first pair of feet 2, 3, 2 ; penultimate 3, 

 3, 2; last 1, 3, 2, 0-1, 3, 3, 6. Posterior pair of feet moderate, in the 

 male the fifth joint is produced on the inner side into a short blunt pi- 

 lose lobe. Claw of the female genitalia short, wide, tripartite; spines 

 short and stout, subequal. Length of male 16-21 m,n ; female 12-18 mm . 



Habitat. — Winona, Minnesota. 



This species is related to trilobus, but is distinguished from it by the 

 greater number of autennal joints, coxal pores, and the larger size. It 

 is described from three males and nine females; I have named it in 

 honor of its collector, Mr. J. M. Holzinger. 



