ICO 



TIIE MYRIAPODA OF NORTH AMERICA. 



S. viridis, Say, Proc. A. N. S. 1821, p. 110; (Euvr. Entom. Ed. Lequien t. i, p. 23. 



S. punctiventris, Newport, Ann. and Mag. Nat. Hist, xiii, p. 100; Linn. Trans, xix, p. 3SG; Catal. Brit. 

 Mus. Myriap , p. 33. 



S. punctiventris, P. Gervais, Apteres t. iv, p. 277. 



S. viridis, P. Gervais, Apteres t. iv, p. 277 ; et Tail, des Myriap. (Exp. Amer. du Sud, part, sept.), p. 30. 



" " Wood, Jourri. A. N. S., new series, vol. v, 1863, p. 22. 



S. parva, Wood, Proe. A. N. S., 1861, p. 10. 



The antennae are generally, but not invariably, without pubescence. The first segment 

 of the body is the smallest, the third the next. The sutures between the true sterna and 

 episterna are well marked, those between the scuta and episcuta barely traceable. The 

 cephalic segment is slightly depressed. The dental lamina have their margins rounded in 

 some specimens. The scuta are frequently bordered with very dark green posteriorly. 

 The dorsum in some individuals has a dark central stripe, vanishing posteriorly. This is, 

 without doubt, the species intended to be indicated by Mr. Say, although his description 

 is exceedingly indefinite and scarcely agreeing with the facts. I have, however, seen one 

 specimen with its posterior feet tipped with blue, and another in which the posterior mar- 

 gination was yellowish, as he describes them. Neither have 1 any doubt in referring Mr. 

 Newport's S. punctitx ntris to this species, although the number and arrangement of the 

 spines on the posterior feet differ somewhat from those given by that author. One speci- 

 men belonging to the Smithsonian (No. 329) approximates to his description. The types 

 of S. parva are in the collection of the Academy of Natural Sciences, brought from the 

 mountains of Georgia by Dr. Le Contc. Length 2 inches. 



TABLE SHOWING VARIATIONS IN SPECIFIC CHARACTERS. 



//-/'.. Florida, Georgia. — Smithsonian Collection. 



1 The labial teeth in this specimen me very small and much coadnate. 



