CLASS MYRIAPODA. 245 



Sub Ord. I. SCHIZOTAESIA. 



Antennae nmltiarticulatae, corpore multo longiores. Scuta singula segmenta duo obte- 

 gentia. Oculi compositi. Tarsi multiarticular, longissimi. 



Fam. Schizotarsia, Brandt, Eecueil, p. 26. 



Tribe Schizotarsia, Newport, Linn. Trans., vol. xix, p. 274. 



Fam. 1. CERMATIIDiE Scuta 8, singula stigmata mediana postice instructa. 



Fam. Cermatides, Leach, Linn. Trans., vol. xi, 1815, p. 381. 



Fam. ScuTiGERiDiE, Gray, Cyclop. Anat. et Physiol., vol. iii, 1847, p. 546. 



Fam. Scutigerid/E, Gervais, Apt., vol. iv, p. 56. 



Fam. Cermatiid;E, Newport, Linn. Trans., vol. xix, p. 275. 



Sub Ord. II. HOLOTARSIA. 



Antennas 12 — 60 articulator, corpore haud longiores. Scuta singula segmento unico 

 obtegentia. Oculi simplices vel nulli. Tarsi 3 articulati, breves. 



Fam. Holotarsia, Brandt, Recueil, p. 26. 



Tribe Holotarsia, Newport, Linn. Trans., vol. xix, p. 275. 



Fam. 2. LITHOBIIDiE. Scuta 15, inaequalia, in seriebus duabus alternantibus dis- 

 posita. 



Fam. Lithobiid^e, Newport, Linn. Trans., vol. xix, p. 275, et auctores. 



Fam. 3. SCOLOPENDRILVE. Scuta 21—23, in serie unica disposita. Pedum pos- 

 tremorum coxa? magna?, incrassata?, armatae. 



Fam. ScolopendridvE, Leach, Linn. Trans., vol. xi, p. 381 {partiwi). 

 Fam. Scolopendrid.e, Newport, Linn. Trans., vol. xix, p. 275, et. Gervais. 

 Fam. Scolopendridje, Gray, Encycl. Anat. Physiol., vol. iii, p. 547 (partim). 



Fam. 4. SCOLOPENDRELLIILE.* "Corpus pedesque breves, appendicibus styli- 

 formibus. Segmenta inaequalia ; scutis 16 dorsalibus imbricatis. Antennae elongata*, arti- 

 culis ultra 16." 



* 1 have never seen a speeimen of this family, and give the characters assigned by Mr. Newport. 



