CHILOGNATHA INSECTA. 5'2l 



segment of the body, at some distance from the genital openings. 

 In (rlomeris, this copulatory organ seems to be replaced by two 

 accessory pairs of appendages on the anal segment. The young 

 possess at first only three pairs of legs, and the metamorphosis would 

 therefore seem to be more complete than in the Chilopods. 



The Chilognatha live in damp places, beneath stones on the 

 ground, and feed on vegetable and dead animal matters. Many of 

 them roll themselves up into a, ball like the woodlice or into a spiral. 



Fam. Polyzonidae. \Vitb small head and subeylindrical body which can be 

 rolled up into a spiral, and suctorial mouth parts. Polyzonivm germanicum 

 Brdt. 



Fain. Julidae. The head is large and free. The eyes are mostly aggregated 

 together ; with cylindrical body, which can be rolled up in a spiral ; without 

 broad dorsal plates. The limbs meet together in the middle ventral line. 

 Juliix salntlositx L. 



Fam. Polydesmidse. With large free head and laterally extended dorsal 

 plates. The number of somites is small. Pult/tfr.-ointx complanatus Deg., 

 Pi>lt/.irnux Idf/in-Hs L.. with twelve pairs of legs. Ptnu-nf/i/x Hii.i-lri// Lubb. 



Fam. Glomeridse. The body is short and broad, and can be rolled up into a 

 ball. There are only twelve to thirteen segments, which possess dorsal plates. 

 The last rintr of the body is shield-like. They remind one of the genus 

 Armadillo, (tlomrrix ni/ir//h/nfti Leach., with seventeen pairs of legs : in the 

 male there are in addition two pairs of genital appendages at the hinder end 

 of the bod} 1 . Splieerothervum rJnH//f<h<m Brdt. 



Class V. HEXAPODA - = INSECT A. 



Tracheata with two 

 antenna on the head, 

 and ti-if/t f/n-f'e pairs 

 of leys and usually 

 ffu jxtii's of (rings 

 on f/te fh/-i(,i', which 

 latter is composed of 

 three segments; the N^S^ St 



abdomen has nine or Fl(} 42 8. Head, thorax and abdomen of an Acridiitm seen 

 ten segments. from the side. St, Stigmata ; T, tympanic organ. 



* J. Swammerdam. " Uistnria lusectorum generalis." l.'trccht, K'.C.lt. J. 

 Swammerdam. " Bijbel der natuure," 1737-17MS. Reaumur, Meinoires pour 

 servir a 1'hintoire des Insectcs.'' !2 vols.. Paris. 17:U-174-2. Ch. Bonnet, 

 'Traite d'lnsectologie,'' 2 vols.. Paris, 1740. A. Piosel von Piosenhof, ' Iii- 

 sectenbelustigungen," Niirnberg, 174(1 to 17U1. ch.de Geer, " Memoires pour 

 servir a Phistoire des Inse-'ir>." s vuls., 1752 to 177<!. H. Burmcisier. " llaud- 

 buch der Entomologie," Halle. is:!2. 



