TIIK MYKIAPODA UF KOKTH AMKKICA. 31 



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

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



Last pair of feet lonj;, not swollen. 



(.'law <»f the female «,MMiitalia wide, trii)artit«'; spines moderately long 

 and stont, Kul>e«iual, point of the inner sonietimes curved inwards. 



Length of body 2r>"""; posterior legs 10""". 



Habitat. — Eastern I'^nited States. 



I have examined numerous s])eeiniens <)f this si>ecies from Blooming- 

 ton, Ind., and Ludington, Mich. 



►Specimens 12"'"' long difler from the adult as follows: 



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

 lighter. 



Antenna' moderate, Joints 2(», moderately long. 



Ocelli 1(>-17, arranged in it series. 



Coxal pores arranged in 2 or 3 series. 



Length of last pair of legs 5"'"'. 



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

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

 first pair of feet 2, 3, 1; length of last i>air of legs 3""", while tliose .">"'"' 

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

 Bpines of the first pair of feet 1, 2, 1; length of L m i»air of legs 2"'"'. 



Fandly li.— SCUTIGEIIID.E (lervais. 

 Genus II. — Soutigeka Lamarck. 



18. Scutigera forceps (Rafiuesqiie). 



Silista forceps Katine8<iiie, Annals of Nature, 7, 1820. 



Sen t iijcid /(irceps yieiwcrt, I'roc. Amer. Philos. Soc, Phila., 171, 18S5. 



Light brown, dorsal plates Avith three black stripes, tlic outer more 

 or less broken, a greenish spot on the i)osterior border of each j)late on 

 each side of the median line; antenme and tarsi brown, i)atella and 

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

 violet. 



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

 ranged in almost regular series. 



Cephalic plate large po;>teriorly, a moderate sulcus, not much im- 

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

 long (6:5). 



Antenme rather slender, exceeding the length of body. 



IJorsal plates moderately marginate, outer margin very sparsely 

 spinulose, posterior margin strongly rounded, deeply excised in the 

 middle, spines more numerous than on t!>e outer margin. 



Last dorsal plate narrow, Avith two indistinct transverse sulcatious, 

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

 cised. 



