1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 257 



joints produced into a short, blunt lobe, which is surmounted with 4 

 spines, the basal third of the fourth joint produced into a large, Hat, 

 outward curving lobe, about S""™ long, the end with a row of bristles, 

 the eud of the same joint i)roduced into a small, sharp, outward pointing 

 lobe; female, the end of third joint swollen, pilose, also two large spines, 

 base of fourth joint produced into a cylindrical lobe, directed forwards, 

 pilose, a little shorter than in the male, the end of the same joint swollen 

 on the inner side. 



Claw of the female genitalia wide, tripartite ; spines stout, subequal. 



Length of body 10-15""" ; last pair of legs 4-5""°. 



Habitat. — Bloomington, Ind., and Kock Island, 111. 



The above description was taken from a male and female from the 

 former locality. I have also sent a male to the collection of Dr. Anton 

 • Stuxberg, of Goteborg, Sweden, under the name of L. hilahiatus. Dr. 

 Wood, in his description of Lithohius hilahiatus, has included two species. 

 I have restricted hilahiatus to the one having the ordinary type of hind 

 legs, the other I have described as a new species — Lithohius tuher. 



5. Lithobius proridens, sp. nov. 



Yellow-brown ; antennie, feet, and ventral laminae pale. 



Slender, smooth, sparsely pilose; ventral lamimie more densely pilose 

 posteriori}'. 



Head obcordate, of about equal length and breadth (3: 2. 5), smooth, 

 sparsely pilose. 



Antenuie moderate, joints 21-29, short ; rather densely pilose. 



Ocelli sometimes indistinct and irregular, 8-15, arranged in 4-G 

 series. 



Prosternal teeth 10-12, small, not crowded together. 



Coxal pores 3, 4, 4, 3-4, 6, 5, 5 large and round. 



Spines of the first pair of feet 2, 3, 1-3, 3, 2 ; penultimate 1, 3, 3, 1- 

 1, 3, 3, 2; last pair 1, 3, 3, 1-1, 3, 3, 2. 



Posterior pair of feet long, not swollen. 



Claw of the female genitalia long and slender, whole; spines mod- 

 erate, subequal. 



Length of body 10-12™"' ; last pair of legs 4-5™". 



Hahitat. — Bloomington, Ind. 



This species is common under leaves, «&;c. 



The following is the description of a specimen 5'"™ long. 



AntenD;i3 short, joints 21. Prosternal teeth 10. 



Ocelli distinct, 1, 2, 1. Coxal pores 1, 1, 1, 1. 



Spines of the first pair of legs 2, 3, 1 ; penultimate 1, 3, 3, 1 ; last 

 pair 1, 3, 3, 1. 



6. Lithobius pullus, sp. nov. 



Brown ; head darkest, feet and ventral lamiucie pale ; tip of antennas 

 and prehensorial feet chestnut. 

 Proc. 2^. M. 87 17 



