THE MYRIAPODA OF NOKTH AMKRICA. 



This spocioH is <lcm>rilM'(l from ono H]N>ciiiu'ii roll««<'t<»«l by Mr. Waltrr 

 I). Howe. It is H'latrd to /.ithnhiutt piillux, lnit is (listinunislKMl by its 

 larpor si/r, tho joints ot'tlio aiitt'iiii.'is the roxal pon-s, and a lew p<ijiit8 

 alH)iit th(t chiw of th(> ft'tnalc ;;«'tiifalia. 



3. Lithobiua biiabiatus W I. 



l.ilhohiHB hilahiatux WrunX, Vnu-. Aiail. Nat. S< i. I'hil., I.'MI, iMiT. { L'ork 

 hland. III.) 



Hrown, hi'ail ilark«»st, fwt ami v«'iitral lamina* pah'r, the tip of ftii- 

 tenmc nifoiis. 



Som^'what robust, smooth, a litth' rou;;hoiie<l posteriorly; s|>arsely 

 hirsute, ventral lamina* somrtimt's almost «h'ns«'ly hirsute posti'riorly. 

 Head lar^e, obcorilate, of nearly tMpial length and breadth, nearly 

 smooth, sparsely pilose. 



Antenna' short, joints L»(>-2.'i, mostly lonp, densely hirsute. 



Ocelli distinet, 11-20, arranj,'ed in 5-7 series. 



Prosternal teeth l-S, moderately lar^e and stout. 



Coxal pores .'{, 4, 4, .'{-4, r», .">, 4, round; sometimes the de)>ression is 

 shallow and the pores indistinct. 



Spines of the first i)air of ft'ot 2, L', L*-L', A, l*; penultimate 1, .'», .S, 1- 

 1, 3, .3, ;j; last pair 1, 3, 1», 0-1, 3, 3, 1. 



Posterior feet rather short, moderately swollen. 



Claw of the female jjenitalia lar<;e and stout, whole; spines short and 

 Rtronp, the inner shortest. 



Leiifjth of body 12-18"""; last pair of lej;s ."i-O""". 



Hnhitat. — Illinois (Uock Island), Indiana (Ulooinington;, Miehipin 

 (Ludington, N. B. Pierce). 



1 have examined a large number of specimens of this species from 

 Bloomington, Ind., an<l one from Ludington, Mich. 



4. Lithobiua tuber, sp. nov. 



LithohiuHhilahiatunWood, Vrnv. Aciwl. \at. Sci. I'liila.. VM), IWJ". (1,'ork Inland, 

 Illino'M, in part ; not tijpr.) 



Brown, head ami ajitenna' darkest, tip of latter rufous, feet and ven- 

 tral plates pale. 



Robust, moderately smooth; dorsal plates s|)arse»y pilose; ventral 

 more densely pilose posteriorly. 



Head large, obcordate, wider than long (3. ."»: 3), mo«lerately smooth, 

 sparsely j)ilose. 



Antemne moderate, joints 20, mostly long and stout, moderately 

 pilose. 



Ocelli, 11-13, arranged in ~» or fi series.. 



Prosternal teeth 4-(}, small. 



Coxal pores 4, 4, 5, 5-4, 5, 5, 4, large ami round. 



Spines of the first pair of feet, 2, 3, 2; i)enultimate, $ 1, 3, 3, 1, $ 1, 3, 

 3, 2; last pair, $ 1, 3, 2, 0, 9 1, 3 (4), 2, 0. 



The last pair of legs moderate, swollen; the inner side provided with 



