42 PROCEEDINGS OF THE ACADEMY OF [Feb , 



Key to American Species of Lithohius, having the Coxal Pores in 

 several -series {Bothi'opohjs) . 



a,. — Posterior angles of none of the dorsal plates produced. 



b^. — Prosterual teeth 9-9; spines of first legs 2, 3, 1, of anal 

 1, 3, 2, 1 ; length 25-29 mm. bipunctatus (Wood). 1. 

 bi. — Prosternal teeth 6-6; spines of first legs 2, 3, 2, of anal 

 1, 4, 3, 1-1, 4, 3, 2; length 18 mm., 



monticola Stuxberg. 2. 



a-i. — Posterior angles of the 9th, 11th and 13th dorsal plates 



produced. 



6i.— Spines of first legs 2, 2, 1-2, 3, 1, of penult 1, 3, 3, 2; 



middle lobe of claw of genital forceps much longest, 



pointed ; inner lobe much reduced ; basal spines 3-3 ; 



antennae long, xanti(\Vood).'o. 



fej.— Spines of the first legs 2, 3, 2, of the penult 1, 3, 3, 1 ; 

 middle lobe of claw of genital forceps not much longest, 

 short and blunt, inner lobe subequal to outer, not 

 reduced ; basal spines 2-2, anteunse short, 



permundus sp. nov. 4. 

 ttj. —Posterior angles of 6th, 7th, 9th, 11th and 13th dorsal plates 

 produced ; prosternal teeth 7-7 to 9-9 ; spines of first 

 legs 2, 3, 1-2, 3, 2, of anal 1, 3, 2, 1-1, 3, 3, 2, 



multidentatus Newport. 5. 



1. Lithobius bipunctatus (Wood). 



Bothropoli/s bipunctatus Wood (1863). 

 Lithobius bipunctatus Stuxberg (1877). 



Habitat. — '' "West of Rocky Moimtains" (AVood) ; Salt Lake, 



Utah, and Uintah counties, Utah (author). 



2. Lithobius montioola Stuxberg. 



Lithobius monticola Stuxberg (1875). 

 Habitat. — Sierra Nevada Mountains (seq. Stuxberg). 



3. Lithobius xanti (Wood). 



Bothropoli/s xanti Wood (1863). 

 Lithobius rur/osus Meincrt. 

 Lithobius xanti Stuxberg (1877). 



Habitat. — California and Oregon (Wood, Bollman, author). 



4. Lithobius permundus spec. nov. 



Lithobius xanti Cliamberlin, Proc. U. S. N. Museum, Vol. XXIV, p. 

 24 (1901). 



Body robust, polished ; head but little wider than long, sparsely 



punctate, especially anteriorly, sparsely pilose ; dorsal scuta nearly 



glabrous except at margins, weakly furrowed, the furrows in part 



