100 BULLETIN 46, UNITED STATES NATIONAL MUSEUM. 



32. Scolopendra woodi Meinert. Ace. 19542, 1, Indian Springs, Ga. ; L. M. Un- 



derwood. 



33. Scolopendra heros Girard. Florida, F. B. Meek; Fort Reynolds, A. Clougli. 



34. Scolopendra pachypus Kohlransch. Ace. 4631, San Diego, Cal. 



As shown by the character of the anal legs this species seems to be 

 sufficiently distinct from heros. 



35. Lithobius proridens Bollniau. Washington, D. C. ; J. B. Smith. 



One specimen. 



36. Lithobius obesus Stuxberg. No. 73a, U. S. N. M., Salt Lake- City, Utah. 



In this vial, along with a few hexopods, I found a male Lithobius, 

 which I provisionally refer to this species. 



As this is a male, the following differences are worthy of notice : 



Antennae 22-jointed; coxal pores 2, 3, 4, 3; spines of first pairs of 

 legs 2, 3, 2 ; of anal pair 1, 3, 2, 0; anal legs of male moderately eras- 

 sate, tibia slightly swollen, excavated on the inner side near the base 

 and the upper interior angle produced into a slight pilose lobe ; last 

 tarsal joints of legs more densely pilose beneath than the rest. 



In the character of the anal legs this specimen agrees with paradoxus, 

 but that species has the number of coxal pores and the spines of the 

 anal legs less. 



37. Lithobius elattus, sp. nov. 



Diagnosis. — Eelated to L. pullus, but spines of anal legs, 1, 3, 2, 0, or 

 1, 3,1, 0; joints of antenme 20-22 ; tarsal lobe of anal legs of male 

 larger; size smaller than L. pullus. 



Habitat.— Washington, B.C. (J. B. Smith); Marksville, Va. (L. M. 

 Underwood). 



Type.—U. S. Nat. Museum. 



Description. — Light brown, head and antennae darker; tip of antennae 

 rufous. Moderately robust, smooth, sparsely pilose; head of about 

 equal length and breadth. Antennae moderate, articles 20-22. Ocelli 

 8-10, arranged in 3-4 series. Prosternal teeth 2 + 2. Coxal pores 2, 

 3, 3, 2-3, 4, 4, 3, round. Spines of first pair of legs 1, 2, 1; of penul- 

 timate pair 1, 3, 3, 2; of anal pair 1, 3, 2, 0-1, 3, 1, 0. 



Male: Anal legs more crassate; first tarsus of anal legs prolonged 

 into a pilose lobe at its upper anterior angle. Female : Claw tripar- 

 tite, short and wide; spines 2 + 2, short and stout, end flattened and 

 barely serrate. Length 8-9.5 mm . 



This species is described from four specimens, three females and one 

 male from Washington, D. C, and a male from Marksville, Va. 



Although the above descriptions hardly seem to do justice in sepa- 

 rating this new species from L. pullus, yet, when we place the two 

 species side by side, they can not be mistaken, as the size of pullus is 

 always 2-4" m ' larger. 



