2G BULLETIN 46, UNITKD STATLS NATIONAL Ml'SEUM. 



Antenn.T short, joints 20-31, rather short ami thick; ileusely pilose. 



OcelH distinct, {>-10, in 4-ii series. 



Prosternal t<'«'th 4, small and indistiiu-t. 



Coxal i)ores 2, 2, .'J, 2-2, 4, 3, 2, round. 



Spines of the first i)air of feet, 2, 3, 2; penultirnnte 1, 3, 3, 1 ; last i)air 

 X, o, i5, A~l, ", •', •-• 



Posterior ])air of feet nnnierate, not swollen. Claw of the female 

 jjenitalia wide, tiii»aitite, the middle lolx'; not much lon]i;er; spines short 

 and robust, the inner aliortest. 



Length of body ()-!>"""; last pair of le};s 2-2.5""". 



Habitat. — Bloomingt<m, Ind. 

 ^ This species is coiuiuon; 1 have taken it mostly under boards laid on 

 a heavy growth of grass in the spring. 



Subgenus Lithohius Stuxberg. 



9. Lithobius hovrel, sp. no v. 



Brown; head chestnut, antenna' very dark, feet and ventral lamina) 

 pale. 



Robust, not smooth, more so posteriorly; sparsely pih)se. 



Head large, subquadrate, a little wider than long; sparsely i)ilose. 



Antenme short, .joints 20, mostly long; densely pilose. 



Ocelli distinct, 25, arranged in 7, very oblicpie series. 



Prosterual teeth 0, small. 



Coxal pores 5, 5, 0, 5, large and oval. 



Spines of the first pair of feet 2, 3, 2; ])enultimate lost; last pair 

 1, 3, 3, 1. 



Last pair of feet rather long. 



Length of body 15""" ; last pair of legs 7"'"'. 



Habitat. — Fort Snelliug, Minn. (Walter D. Howe.) 



This species is described from one male in a rather bad condition, 

 collected by my friend and fellow-student Mr. Walter 1>. Howe, after 

 whom the species is named. 



10. Lithobius ? aztecus Humbert & Saussure. 



Lithobius aztecm Humbert & Sau88ur»s Kev. «fe M.^j^. Zool., 2" ser., xxi, 156, 

 1869. 



Brown; scuta margined posteriorly with dark; head and anteniuB 

 dark; prehensorial feet and tip of antennae rufous; feet and ventral 

 laminje very pale. 



Kobust, not smooth, more so posteriorly; sparsely pilose. 



Head large, subquadrate, a little wider than long (4.5: 4); nearly 

 smooth, sparsely punctate; a few hairs scattered over the surface. 



Antemne moderate, joints 31, rather densely pilose. 



Ocelli 27, arranged in 8 series, rather crowded together. 



Prosterual teeth 12, the inner very small, the rest of an even size. 



Coxal pores 7, 7, 6, 5, round, and small. 



