118 MODERN SYSTEM. 



** Wandcj'CJ'S. 



a. Land. 



Genus 11. Oribat.v : 12. Smaris: 13. C'heyletus: 14. Bdella: 

 1.3. ER,YTHRius: 16. Trombidium. 



b. Aquatic. 



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



III. PIIALANGIDES. 



Genus 20. SiRo: 21. Trogulus: 22. Piialangium : 23. Galeodes, 



IV. SCORPIONIDES. 



Genus 24. Chelifer: 25. Scorpio: 26. Thelephoxus: ^7. Phry- 



NUS. 



V. ARANEIDES. 



Genus 28. Araxea: 29.Mygale. 



Classification. — The following Classification is that lately pub- 

 lished in the third volume of the Zoological Misccllnni/. 



Order I. Polymerosomata. — Bodi/ composed of a scries of seg- 

 ments : abdomen not pedunculated : mouth furnished with didactyle 

 mandibles and with maxillie : ci/cs two, four, six, or eight : legs eight. 



Order II. Dimerosomata. — Bodi/ composed of two segments ; the 

 abdomen pedunculated: 7nouth furnished with mandibles and with 

 maxillie : c^cs six or eight. 



Order I. POLYINIEROSOMATA. Leach. 

 Fam. I. SiKOMD.E. Leach. 



Palpi simple. Mandib/es didactyle. 



Genus 1. SIRO. L^atrcillc, Leach. 



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

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

 longest: bodj/ oval : e>/es two, placed one on each ^idc of the thorax 

 on an erect peduncle: legs elongate, filiform; tibia and taisi two- 

 jointed, the latter parts terminated by an arcuate claw. 



Sp. 1. Siro rubcns. Pale red: legs paler. 



Siro rubens. LMt>\ Gen. Crust, et Insect, i. 143. Leach, Ediv. Tla- 

 cj/cl. vii. 416. — Trans. Linn Soc. xi. 390. — Supp. to Enci/cl. Brit. i. 

 433. pi. 23. 



Inhabits moss at the roots of trees and in woods. 



