THE MYRIAPODA OF NORTH AMERICA. 31 



First pair of feet armed with 2, 3, 1-2, 3, 2 spines ; penultimate 1, 3, 3, 

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



Last pair of feet long*, not swollen. 



Claw of the female genitalia wide, tripartite ; spines moderately long 

 and stout, subequal, point of the inner sometimes curved inwards. 



Length of body 25 m "' ; posterior legs 10 mm . 



Habitat. — Eastern United States. 



I have examined numerous specimens of this species from Blooming- 

 ton, Ind., and Ludington, Mich. 



Specimens 12 mm long differ from the adult as follows: 



Violet-brown; head bright chestnut; antenna' and posterior legs 

 lighter. 



Antennae moderate, joints 20, moderately long. 



Ocelli 16-17, arranged in 6 series. 



Coxal pores arranged *in 2 or 3 series. 



Length of last pair of legs 5 im ". 



Specimens 10 nmi long differ from the above in having 13 ocelli, ar- 

 ranged in 6 series; coxal pores in 1 or 2 series, and the spines of the 

 first pah- of feet 2, 3, 1 ; length of last pair of legs 3 mm , while those 5 mm 

 long have the ocelli 8, in 5 series; coxal pores 2, 2, 2, 2, in one series; 

 spines of the first pair of feet 1, 2, 1; length of last pair of legs 2 mm . 



Family B.— SCUTIGERID^F Gervais. 

 Genus II. — Sotjtigkera Lamarck. 



18. Scutigera forceps (Rafinesque). 



Selista forceps Rafinesque, Annals of Nature, 7, 1820. 



Scutigera forceps Meinert, Proc. Anier. Philos. Soc., Phila., 171, 1885. 



Light brown, dorsal plates with three black stripes, the outer more 

 or less broken, a greenish spot on the posterior border of each plate on 

 each side of the median line; an tenure and tarsi brown, patella and 

 tibia with two bluish bands, those of the last pair of legs dark, almost 

 violet. 



Robust, dorsal plates with obscure tubercles, spines numerous, ar- 

 ranged in almost regular series. 



Cephalic plate large posteriorly, a moderate sulcus, not much im- 

 pressed, margins not strongly elevated, moderately smooth, wider than 

 long (6:5). 



Antennas rather slender, exceeding the length of body. 



Dorsal plates moderately marginate, outer margin very sparsely 

 spinulose, posterior margin strongly rounded, deeply excised in the 

 middle, spines more numerous than on the outer margin. 



Last dorsal plate narrow, with two indistinct transverse sulcations, 

 sides rounded, not converging much, posterior margin obscurely ex- 

 cised. 



