18ri7.] PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 625 



Pairs ot le.!];s, 9 04 to 07. Length of body, $ 30""" 5 width 1.2""". 



I have I'xaiiiiiied :i number of specimens collected by Mr. J. H. Burke, 

 of Ukiali, (Jal. This species should be placed uear G. occidcutalis Mei- 

 uert, altliou<^4i it seeuis to bear little relation to the latter. 



12. Lithobius eigeniuanui, sp. iiov. 



Diagnosis. — Allied to Lithobius obesus Stuxberg, but the claw of female 

 genitalia tripartite ; spines of anal feet 1, 3, 3, ; coxal pores more num- 

 erous. 



Type. — U. S. IS'at. Museum. 



Habitat. — Glacier, British Columbia. 



Description of type. — Brown, feet paler, slender, moderately rough 

 posteriorly ; head scarcely wider than long. Antenna) short, articles 

 20, short. Ocelli 8 to 12, arranged in 4 or 5 series. Prosternal teeth 

 2 + 2. Coxa^ of 13, 1-4, 15 pairs of legs laterally armed. Coxal pores 3, 4, 

 4, 3 to'4, 5, 5, 5, large and round. Spines of first pair of feet 1, 2, 1; 

 penultimate pair 1, 3, 3, to 1, 3, 3, 1 ; anal pair 1, 3, 3, 0. Claw of female 

 genitalia tripartite ; spines (2 4- 2) stout and short, inner shortest. 



Length of body 7.5 to 9"'"', width 1.1 to 1.5"""; antenniii 3 to 3.5'"'"; 

 anal legs 3.2 to 3.8'"'". 



I have examined a number of specimens collected by Mr. Carl H. 

 Eigeumann, to whom I take great pleasure in dedicating this species. 



13. Lithobius atkinsoni, sp. nov. 



Diagnosis. — Anal and penultimate pairs of legs each armed with a 

 single claw; joints of antennae 26, color chestnut. 



Type.—V. S. Fat. Museum. 



Habitat. — Balsam, Jackson County, JS". C. 



Description of type: — Chestnut, head and antenna) of a deeper shade, 

 legs orange. Slender, dorsal plates moderately smooth, especially an- 

 teriorly, very s])arsely pilose ; head obcordate, length and width sub- 

 equal. AutennjB short, reaching to fifth segment, joints 20, small. 

 Ocelli 14-5. Prosternal teeth 5 -|- 5, small. Coxa of the (?) pairs of feet 

 laterally armed. Coxal pores 4, 5, 5, 4, small and round. Spines of first 

 pair of legs 2, 1, 1 ; penultimate and anal pairs 1 , 3, 3, 2. Anal legs some- 

 what swollen, tarsic of anal and penultimate pairs of legs sulcato on 

 inner side. Claw of female genitalia short, tripartite ; spines 2 + 2, inner 

 shortest. 



Length of body 12.5'"'", width 1.8""" ; antenme 4"""; anal legs 5'"'". 



This species bears no relation to any known from North America . 

 in fact, it is the only one of the subgenus LitJiobius with the penulti- 

 mate pair of legs armed with a single claw. 



I have examined one specimen collected b}' Prof. George F. Atkinson, 

 of the University of iSTorth Carolina, to whom I have the honor of dedi- 

 cating this species. 



Proc. N. M. 87 40 



