Ki4 THE MYRIAPODA OP NORTH AMERICA. 



joint of penultimate pair armed with 5 spines on a terminal angular process and 1—2 others ; last pair very 

 elongate, subcylindrieal, not compressed, basal joint much longer than the tibial, armed with 80 — 15 spines in 

 longitudinal .-erics; angular process large, with G — 8 spines; lateral anal appendages densely punctate, elongate, 

 each with 8 — 12 apical spines, and sometimes 1 — 1 marginal. 



S. lonoipes, Wood, Journ. A. N. S., New Series, 1863, vol. v, p. 20. 



This species is closely allied to S. alU mans, Leach, but differs from the characters given 

 by Mr. Newport; first, in the mandibular tubercle (mandibular tooth of Newport), being 

 very large and having the lesser tubercle near to its base ; secondly, in the number of 

 spines on the basal joint of last pair of legs being from 30 — 45 instead of from 45 — 60 ; 

 and finally, by the roughness of the lateral anal appendages. Besides, the specimens agree 

 in possessing important characters not mentioned by Mr. Newport, and which it is fair to 

 conclude do not exist in his species. 



The head and its appendages are very large and stout. The antenna? are generally 

 lighter in color than the body. The first scutum is much the smallest. The lateral mar- 

 gins of the anterior scuta are straighter than those of the posterior, which are elevated. 

 The posterior margin of the terminal scutum is very strongly arcuate. The scuto-episcutal 

 sutures are traceable, but not so well marked as the sterno-episternal. The femur of the 

 nineteenth pair of legs is furnished with two small spines on its distal extremity ; that of 

 the twentieth with one or two on its upper surface, and a well-marked terminal angular 

 process supporting five small spines. The femur of the last pair is rather depressed than 

 compressed, and armed with 30 — 45 small spines, irregularly arranged in rows on its 

 upper, inner, and lower surfaces. The preanal scale is somewhat elongate, and narrowed 

 posteriorly. 



Jlil:. Florida. — Smithsonian Collection. 



S. 1SYSSJNA. 



S. saturate viridis aut brunnea ; capite dilute castaneo, et labio mandibulisque sparse punctatis; segment* 

 eephalico late ovato, antice leviter emarginato, segmento prebasali oullo; antennis luteolis, 18 articulatis, pube- 

 Bcentibus; dente mandibulari gracilej laminis dentalibus latis; dentibus labialibus 10, parvis, nigris, utrinque 

 tribiiB intimis coadnnatis ; pedibus gracilibus, luteolis, modiee compressis ; pare postremo supra complanato, subtus 

 valde cunvcxo, marginibus superioribus et extern.) et interoo acutisj articulo basali tibiali longiore et intus et sub- 

 tus 1 > i v < 1 tri-spinoso, processu angulari bifido vel trifidoj superficie ventrali brunneo-olivacea ; appendieibus 

 analibu* lateralibus profunde dense punctatis, modiee elongatis, singula spinis apicalibus 2 — S, spicibua hand 

 incut i 



Dei p green or brown ; head ligbl i hi unit, with the labium ami mandibles sparsely punctate ; cephalic segment 

 broadl; ovati anteriorly slightlj emarginate, prebasal segment wanting; antennae yellowish, 18 articulate, pube- 

 ' . mandibul ir tooth li adi i . dental laminsu broad ; labial teeth L0, small, black, the inner three on each sidi 



