Female : claw of the genitalia short, tripartite, middle lobe much longer, others 

 subequal ; spines moderately slender, inner shortest. 

 Length of body 15 — 25 mm. 



Abundant or common throughout the State. 



This species is not strongly related to any known North American 

 locality, it should be placed near /orjica/i/s, which it seems to replace in 

 Arkansas. 



Dr. Wood has reported /brjica/tis from Arkansas and he ma}- have 

 had the species which I have described. 



35. Lithobius cedipes, sp. nov. 



Posterior angles of tlie 9, il, 13 dorsal plates produced. Anal pair "f l--:'^ armed 

 with tw6 claws. Coxal pores few, in a single series. Pcnultmiaie pan- of li,-t;s aimed 

 with two claws. Posterior coxae unarmed. Brown, head and antini ac dark, legs 

 and ventral plates paler. Robust, not smooth, sparsely pilose ; head smooth, of about 

 equal length and breadth (3.2, 3.6). Antennae short, attenuate, 24- to 26-jointed 

 ((^, 26, 9 24). Ocelli 9 to II, arranged in 3 or 4 series. Prosternal teeth 2 -f 2 or 

 3-I-3. Coxal pores 3,5,4,3 to 6,5,5,5 round. Spines of the first pair of legs I,I,I ; 

 penultimate pair 1,3,3,2 ; anal pair 1,3,3,1. Posterior pair of legs short. 



Male : femur of the last pair of legs somewhat bent inwardly and swollen ; tibia 

 very strongly swollen, especially above and having a bunch of hairs on the posterior 

 third ; first tarsal joint crassate. Penultimate pair of legs somewhat swollen, prin- 

 cipally the tibia ; first tarsal joint produced into a short lobe on the inner side. 



Female : posterior pair of legs scarcely swollen ; claw of the genitalia entire ; 

 spines 2 — 2. 



Length of male 15.4 mm.: of female 20 mm. 



Hab.— Little Rock. 



I have three specimens of this species. This is the only known 

 species with b.oth the anal and penultimate pairs of feet swollen or pro- 

 duced into lobes. 



36. Lithobius transmarinus Koch. 



Abundant at Little Rock, common at other localities. 



37. Lithobius mordax Koch. 



Common from Little Rock to Ultima Thule. 



38. Lithobius vorax Memert. 



Found at all points where collections were made, but was more 

 common at Little Rock. 



39. Lithobius multidentatus Newport. 



In a vial of Myriapods that were collected near Little Rock by Mr. 

 Hutcherson, there is a single specimen of this species. 



40. Scutigera forceps (Rafinesque). 



One adult was seen at Arkadelphia, and several young at Little Rock. 

 Indiana University. March 28, 1888. 



