160 



THE MYRIAPODA OF NORTH AMERICA. 



S. viridis, Say, Proc. A. N. S. 1821, p. 110; (Euvr. Entom. Ed. Lequien t. i, p. 2.'!. 



S. punctiventris, Newport, Ann. and Mag. Nat. Hist, xiii, p. 100; Linn. Trans, xix, p. 386; Catal. Brit. 

 Mus. Myriap , p. 33. 



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



S. viridis, P. Gervais, Apteres t. iv, p. 277; ct Tabl. des Myriap. (Exp. After, du Sud, part, sept.), p. 30. 



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



S. parva, Wood, Proc. A. N. 8., 1861, p. 10. 



The antenna) 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 arc 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 I any doubt in referring Mr. 

 Newport's S. punctieentris 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 Conte. Length 2 inches. 



TABLE SHOWING VARIATIONS IN SPECIFIC CHARACTERS. 







Spines on inner surface 



Spines of inferior surface of 



Spines on termi- 



Spines on 



ateral anal 



Number of 

 specimen. 



Labial teeth. 



of baaal joint of poste- 

 rior pair of legs. 



basal joint of posterior pair 

 of legs. 



nal angular pro- 

 cess. 



appor 



<l;igo,^ 



Marginal. 



Apical. 







f 4 



5 



2 2 2 2 



2 













4 



6 



2 3 2 



2 



3 





116 



■< 



4 



4 



2 12 2 



2 



4 



1 







4 



? 



? ? ? 



? 



5 



1 







? 



ft 



2 2 3 2 



2 



3 











4 



4 



2 12 2 



2 



3 



1 



336 





4 



5 



3 2 4 3 



2 



3 



1 





'4 



5 



3 2 3 3 



2 



ft 



1 







4 



? 



f ? ? f 



? 



3 







332 





4 



5 



2 3 3 2 



2 



3 











5* 



5 



2 2 2 3 2 



2 



3 



1 







7 





a reproduced leg. 





4 



1 



170 





4 



5 



3 2 2 2 



2 



3 



1 







4 





a reproduced leg. 





5 



1 



329 



4 



ft 



2 2 2 



1 



3 









4 



? 



? ? ? 



1 



2 







Bah. Florida, Georgia. — Smithsonian Collection. 



fe The labial teeth in this specimen are very small and much coftdnate. 



