290 CLASS VII T. 



Comp. J. F. BRANDT, Tentaminum quorundam Monographicorum, Chi- 

 lognatha spectantium Prodromus. Hullet. de la Soc. imp. des Naturalistes 

 de Moscou, vi. 1833, pp. 194209. Tab. v. 



Phalanx I. Sugentes (Siphonizantia BRANDT). Mandibles and 

 maxillae coalesced to form a tube. Body elongate, narrow. 



Polyzonium BRANDT, Platyulus GERV. Two series of three 

 small eyes in the frons. 



Sp. Polyzonium germanicum, Platyulus Audouinianus GERV., KOCH in PAN- 

 ZER'S Deutschl. Insecten, fortgesetzt von HERRICH SCH.EFFER, Heft 190, 

 No. 17. 



Siplionotus BRANDT. Two distinct eyes in middle of frons. 

 Siphonophora BRANDT. Eyes none. 



Phalanx II. Manducantes (Gnathogena cliilognatha BRANDT). 



A. Middle segments of the body formed of a single complete 

 ring, to which the feet are inserted in the sides of the abdominal 

 protuberance. Monozonia BRANDT. 



Pollyxenus LATR. 1 Body soft, with segments not numerous, 

 with hairs or scales elongate, pinnatind, fasciculate, set on a tuber- 

 cle at the sides, with the last segment penicillate. Eyes aggregated 

 in two clusters. 



Sp. Pollyxenus lagurus, Scolopendra lagura L. ; DUM:RIL, Consid. gener. 

 PI. 58, fig. 7 ; GUERIN Iconogr. Ins. PI. I. fig. 5 : this little animal lives 

 under the bark of trees and in moss, and then attains a size of more than 

 a line. In this species also DE GEER has observed the increase in number 

 of rings and feet (Mem. presentees a I'Acad. des Sciences de Paris, I. 532; 

 Mem. pour VHist. des Ins. vn. pp. 576 578. The full-grown insect has 11, 

 or according to KOCH, 1 3 pairs of feet. 



Polydesmus LATR. (species of Julus L.) Body covered with a 

 hard skin, with segments produced at the sides, depressed. 



Polydesmus LEACH. Eyes none. (Sub-genera Tropisoma, Scyto- 

 notus, Platyrhceus, Polydesmus, Rhacophorus, Euryurus, Oxyurus, 

 Fontaria KOCH). 



1 Some zoologists write Polyxenus, but we leave the word, of which the derivation 

 is unknown to us, as LATREILLE wrote it ; he wished to express by it crafty (rus) t 

 (Hist. not. des Crust, et des Insect, vn. p. 62), although as little of particular craft is 

 known to us in this little animal, as of a Gi*eek word agreeing with this name, which 

 denotes crafty. 



