80 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



35. Lithobius cedipes, sp. nov. 



Posterior angles of the 9, 11, 13 dorsal plates produced. Anal pair 

 of legs armed with two claws. Coxal pores few, in a single series. 

 Penultimate pair of legs armed with two claws. Posterior coxae un- 

 armed. Brown, head and antennae dark, legs and ventral plates paler. 

 Eobust, not smooth, sparsely pilose; head smooth, of about equal 

 length and breadth (3.2: 3.6). Antennae short, attenuate, 24 to 20 

 jointed ( S , 26, 9 , 24). Ocelli 9 to 11, arranged in 3 or 4 series. Pro- 

 sternal teeth 2 + 2 or 3 + 3. Coxal pores 3, 5, 4, 3 to 6, 5, 5, 5 round. 

 Spines of the first pair of legs 1, 1, 1; 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, principally the tibia; first tarsal joint produced into a short 

 lobe on the inner side. Female: Posterior pair of legs scarcely swol- 

 len; claw of the genitalia entire; spines 2-2. Length of male 15.4 mm ; 

 of female 20 n,m . 



Habitat. — Little Rock. 



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

 species with both 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 niordax Koch. * 

 Common from Little Rock to Ultima Thule. 



38. Lithobius vorax Meiuert. 



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

 mon 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 (Rarhiesque). 



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

 Rock. 



Indiana University, Marches, 1888. 



