AKACHNOIDEA. 583 



the former : see other species of this genus figured and described in KOCH'S 

 Arachn. v. Bd. pp. 128 149. Tab. 176179. 



Cryptostemma GUER. With ocelli none or indistinct ; with tarsi 

 composed of four or five joints; with mandibles exsert. See GUERIN 

 Revue Zool 1838, p. 11, GERVAIS Apteres, m. pp. 130, 131, PL 47, 

 fig. 4. 



Note. Genus Cceculus LEON DDFOUR Ann. des Sc. nat. xxv. 1832, pp. 

 289 296, PI. 9, figs, i 3, is referred here by its author himself, by 

 GUERIN and others ; but this scarcely seems to be its place. 



Phalangium LATH, (species from genus Phalangium L.). Ce- 

 )halothorax not produced anteriorly. Mandibles exsert. Palps 

 unguiculate at the apex. Tarsi mostly with several (6 8, or very 

 numerous) joints. Ocelli two in the middle of cephalothorax, 

 seated on a common tubercle; two others accessory in many, 

 ateral, remote, situated more forward. 



Gonyleptes KIRBY. Palps spinose, dilated. Coxae of last pair of 

 feet very broad. Dorsal scutum horny, hard. (Tarsi mostly with 

 not more than ten joints. Posterior feet longer than the rest), 



Sp. Gonyleptes korridus KIRBY Transact. Linn. Soc. xn. PI. 22, fig. 6, 

 Centurie d'Ins. Paris, 1834, PI. 4, fig. 8, Brazil; Gonyl. curvipes GUERIN 

 Iconogr., Arachn. PL 4, fig. 5, Chili, &c. 



Note. All the species are exotic; in some the posterior legs are very 

 long, slender, and surpass the body three times or more : Mastigopus (genus 

 ineditum Musei L. B.) or Mitobates SUNDEV. Conspect. Arachn. p. 34. 

 PERTY and KOCH have proposed several other genera, on which see KOCH 

 Uebersicht, i Heft, pp. 8 22. Genera Cosmetus and Discosoma PERTY 

 form the transition between Gonyleptes and Phalangium. 



Phalangium (species from genus Phalangium auctor). Posterior 

 coxse scarcely thicker than the rest. Feet slender, with tarsi having 

 numerous joints (10 15 or more) ; second and last pairs sub- 

 equal, longer than the others. 



Sp. Phalangium opilio L., Opilio parietinus HERBST, KOCH, DE GEER Mem. 

 vn. PI. 10, fig. i, HAHN Arachnid. II. PI. 69; Phal. cornutumi,., Ceras- 

 toma cornutum KOCH, DE GEER ib. fig. 12, HAHN Arachn. n. PI. 70, 

 HERMANN Mem. Apter. PI. 8, fig. 6 (GEOFFROY and LATREILLE hold the 

 two for one species, and the last for the male of Opilio; HERMANN, TRE- 

 VIRANUS, HAHN and KOCH consider them to be different species. These 

 animals (harvest-spiders, basterd-spinnen hooiwagens, faucheurs) run very 

 rapidly ; they lurk in chinks of walls, live on the ground between stones, 

 on trunks of trees, &c. The long thin legs, after their separation from the 

 body, present for a long time indications of remaining irritability. The 



