lis MODEKN SYSTEM. 



** Wanderers. 



a. Land, 



Genus 11. Oribata: 12. Smaris: 13. Cheyletus: 14. Bdella, 

 15. Erythr^us: 16. Trombidium. 



b. AquatiCi 



Genus 17. Elais: 18. Limnocharis: 19. Hydrachna. 



III. PHALANGIDES. 



Genus 20. SiRO : 91. Trogulus: 22. Phalangivm: 23. Galeod{;s. 



IV. SCORPIONIDES. 



Genus 24. Chelifer: 25. Scorpio: 2(3. TiiELEPHONUsi 27. Pkrv- 



KU3. 



V. ARANEIDES. 



Genus 28. Aranea: 29. Mygale. 



Classification. — The following Classification is that lately pub- 

 lished in the third volume of the Zoological Miscellany. 



Order I. Polymerosomata. — Body composed of a series of seg- 

 ments : abdomen not pedunculated: mouth furnished ■<vith didactjle 

 mandibles and with maxillae : eyes two, four, six, or eight : legs eight. 



Order II. Dimerosomata. — Body composed of two segments ; the 

 abdomen pedunculated: mouth furnished with mandibles and with 

 maxillae : eyes six or eight. 



Order I. POLYMEROSOMATA. Leach. 

 Fam. T. Stkonid.e. Leach. 



Palpi simple. Mandibles didactyle. 



Genus 1. SIRO. LatreiUc, Leach. 



Mandibles Vwo; two-jointed, cylindric, compressed; their points armed 

 with a forceps: palpi two, five-jointed ; joints elongate, the second 

 longest : body oval : eyes tsvo, placed one on each side of the thorax 

 on an erect peduncle : legs elongate, filiform; tibict and tarsi two^ 

 jointed, the latter parts terminated by an arcuate claw. 



Sp. 1. Sirorubens. Pale red: legs paler. 



Siro rubens. Latr. Gen. Crust, et hisect. i. 113. Leach, Edin. En^ 

 cycl. vii. 416. — Trans. Linn Soc xi. 390. — Stipp. to Encycl, Brit, i, 

 483. pi. 23. 



Inhabits moss at the roots of trees and m woods. 



