162 THE CANADIAN ENTOMOLOGIST. 



A. dorsopinorum, sp. nv, 



Prosternal teeth, 2 + 2.. Ocelli, 1 1— 1 5, arranged in 3 rows. Articles 

 of the antennae, 21. Coxal pores, 3, 4, 4, 3-4, 5, 5,4, or 14-18. Spines on 

 the first pair of legs, 1,2, 1-2,3, 1 j on the penultimate pair, 1,3,2.1- 1, 3, 3, 2, 

 on the anal pair, 1, 3, 2, 1. Penultimate pair of legs armed with 2 claws ; 

 the anal legs with one claw. Claw of female genitalia tripartite. 



Body depressed. Light brown ; head a little darker. Anal legs only 

 slightly crassate. 



This seems to be related to Bollman's e/atus, but is distinguished from 

 that species by having the ocelli and the coxal pores more numerous, and 

 the spines of the anal legs differently arranged. 



A. Briineri, sp. nv. 



Prosternal teeth, 2 + 2. Ocelli, 9-12, arranged in 3 rows. Antennal 

 articles ( £ )2o-( $ )ai. Coxal pores, round, 2, 3, 3, 2-3, 4, 4, 3, or 10-14. 

 Spines on the first pair of legs, o, 1, 1-2, 2, 1 ; on the penultimate pair, 

 1, 3, 3, 2 ; on the anal pair, 1, 3, 3, 1. Penultimate legs armed with 2 

 claws ; the anal pair with one. Claw of female genitalia entire. 



Scarcely robust. Light chestnut ; head and first scutum darker ; 

 pilose. Head subrotundate ; longer than broad. Antennal joint, head- 

 like, thickly pilose. Body tapering anteriorly. Anal legs not crassate, 

 pilose ; fifth joint sulcate beneath ; the last two joints decidedly flattened 

 on the inner side. 



Lithobins sexdentatus, sp. nv. 



Prosternal teeth, 3 + 3. Ocelli, 19-24, arranged in 4 rows. Antennal 

 articles, 20-21. Coxal pores, 4, 4, 5, 4-4, 5, 5, 4, or 17-18; round. 

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

 1, 3, 3, 2 ; on the anal pair, 1, 3, 2, o. Anal and penultimate legs each 

 armed with a single claw. Claw of female genitalia entire. Slightly 

 robust, dark chestnut ; head darker. Head subrotundate ; longer than 

 broad. Antennae short, pilose, articles long. Anal legs slightly crassate 

 Length, 1 2 mm. 



From the Bad-lands of Sioux Co. 



L. Celer, Boll. 

 L. forficatus (Linn) Leach. 

 Neolithobius mordax, (Koch) Stux. 

 Scut igera forceps, (Raf.) Latr. 



