22 BULLKTIN 4rt, ITNITKD STATES NATIONAL MU8EUM. 



••PoKtcrJor Atmlt'H of!», U. \:\ ilnrMiit p1afi>ii pmilnci'il. 

 II. Aiiiil |iitir of fiu-t iiriiiiMl witli oiik Hpint*; pi-iiiiltimat0 with twn. 

 h. Coxji* iiiiuniHMl; roxiil iHtron in a HiiiKl«> fM-rinn. 



r. Aiit«>niiii> IN) Joiiitr«l; proMtrrmil ti'«>Hi 0; (xrlli 2ft IIowKT. «p. nov., 9. 



ir. Aiiti-iiii:i' iiiiti')- tliaii :U>-,joiiit«>«| ; rliiw of tlii^ fcinaln KrniUiliit tripartite. 

 H. Coxiil pori'Hntiiiiil, 7, 7, (t, ri;aiit<<nnii< :<l-,joint«Ml; ocrlli i*?. .A/iK.crs, 10. 

 dil. (•«».\iil porrn triiDMV(<rH«>, «, <J, 15, 4-H, 10, 9, 6; jnintii of Jiiitfiinii- :«-!:{; 



ocflli j:\-lH I'OUKKATIH. 11. 



hb. t'oxn* Hriiifil wjtli » Hiii;;I«« rolniHf Hpini>; roxal |>or<*H mitlti. criate; priiMtcrnal 



t«'«'th 15-20; jointH of antriinip 20, lonjj Xanti. 12 



ail. Anal and pt'nnltiiiiatt* f(><«t <<a«-li arni<Ml with t ivo Hpinrn; coxa^ luiArniiMl; jointH 



of tlif antenna* 2<»; proHt«inal tiM-th t I'oi.lTi'S, Ki. 



••• I'lmtt-rior an^lcH of tho 7. '.I. 11, l.'l ilorsal ]ilatoH protlurcd. 



a. Anal f«-<>t ariiiKil with ono H]iinis t'oxa' nnariniMl; rnxal pores in a Minf^le nerien. 



/'. P«>nultiniat<> pair of frvt arni)-<l in th«« two Rpin«-n; JointN of antenna' .ll-^^M; 



proHtertial tei'th 12-U; eoxal pon-H 7, 7, G, 5, 10, 10, 10, !», trann- 



verwe; Npini-H of tlie iir»t pair of feet 2, 2, 1, 3, 3, 2. ..MoKOAX, 11. 



hh, Pennltiniatn pair of feet arni4-«l with three HpineH; jointH of antenme 2(i-^K); 



|)roHternal teeth H; loxal )»oreH I, 4, 5, 2,4, 5, .'», 4, ronnd; npinea 



of tlie lirst pair of fe«t 1. 3, 2. 2, 3, 2 Cl^ARls, 15. 



•''•poKterior angles of the 0, 7, i), 11, 13 tlorHal phiten prodnced. 

 a. Anal feetwitli a single spini ; cox;!* armed; eoxal pores mnltiseriate; Joints of 

 antenna- l!»-23; proHt«-rnal teeth ll-l«; spines of the tirst pair of 

 feet 2, 3, 1-2, 3, 2 Ml'LTlDENTATts, 17. 



Suhjjomis Archilithnhius Stnxbor^'. 



1. Lithobhis kochii StuxlxT^. 



I.itlioliiiiH kochii Stuxberjj, Ofver. Kongl. Vetens.-Akn«l. Kordhandl., r>8, IHl't 

 {SiiiiiTlito, Cal.) 



To this species I refer a specimen IVom rkiali, Cal., which has lost 

 the antenna' and nearly all the feet. It has 11 ocelli, arranged in 5 

 series, prosternal teeth 4, small ; coxal jmres 3, 4, 4, 3, small and round ; 

 color fulvous. 



2. Lithobius minnesotae, sp. nov. 



Brown, head darkest, feet and ventral lamina* not much i)alor: tip of 

 antenna' and prehensorial feet rufous. 



Slender, smooth; very sparsely pilose. Head subcordate, wider than 

 long (3. 5: 3), smooth, very sparsely hirsute. 



Anteniue short, joints 20, mostly long; the last long and sharp, 

 densely hirsute. 



Ocelli 13, arranged in fi series. 



Prosternal teeth 4, small and indistinct. 



Coxal pores 4, 5, 5, 4, rather small, round. 



Spines of the lirst pair of feet 1, 3, 2; penultimate 1, 3, 3, 1; last 

 pair 1, 3,2, 1. 



Posterior pair of feet moderately long and slightly swollen. 



Claw of the female genitalia moderately wide, tripartite, the middle 

 lobe much longer; spines robust, subequal. 



Length of body 16"""; last pair of legs ^n'^^ 



JIahitat. — Fort Snelling, ^linn. 



