118 
Modern system. . 
** Wanderers. 
a. Landi 
Genus 11. Oribata: 12. Smarts i 13. Chryletus i 11. Bdell.C 
15. Erytiirieus: 16. Trombidium. 
b. Aqu/itic. 
Genus IT, Elais i 13. Limnociiaris: 19. IIydrachna, 
III. PIIALANGIDES. 
Genils 20. Siro : 21. Trogulus: 22. Phalangium; 23. GalRodFS, 
IV. SCOllPIONIDES. 
Genus 24. Chelifer: 25. Scorpjo: 26 . Theeephonus : 27, Piiry' 
Nus. 
V. AHANEIDES. 
Genus 28, Aranea: , 29 . Mygale, 
Classification. — The following Classification is that lately pub' 
fished in the third volume of the Zoological Miscellany. 
Order I. Polymerosomata. — Body composed of a series of seg- 
ments: abdomen not pedunculated: mouth furnished with didactyl® 
mandibles and with maxilla:: eyes two, four, six, or eight: legs eight. 
Order II. Dimerosomata. — Body composed of two segments; th® 
abdomen pedunculated: mouth furnished with mandibles and with 
maxillae: eyes six or eight. 
Order I. POLYMEROSOMATA. Leach. 
Earn. I. Sironidie. Leach. 
Palpi simple. Mandibles didactyle. 
Genus 1 . SIRO. Latreilk , leach. 
Mandibles two; two*jointcd, cylindric, compressed; their points arm®” 
with a forceps: palpi two, five-jointed; joints elongate, the secoo® 
longest: body oval : eyes two, placed one on each side of the thorn* 
on an erect peduncle : legs elongate, filiform ; tibia and tarsi tv 0 ' 
jointed, the latter parts terminated by an arcuate claw. 
Sp, 1. Siro rubens. Pale red : legs paler. 
Siro rubens. Latr. Gen. Crust, el Insect, i. 143. Leach, Bdin. 
cycl, vii. 416. — Trans. Linn Soc. xi. 390. — Supp. to Encycl , Brit ■ *' 
433. pi. 23, 
Inhabits moss at the roots of trees and in woods. 
