ORDERS. 47 



Examples. Galeodes, shepherd or phalangita, 

 mite er acorus. 



VIII. CLASS INSECTA 



IS DIVIDED INTO TWELVE ORDERS. 



1. MYRIAPODIA, many-footed. Wingless. 

 The number of their feet above six, disposed 



along the whole extent of the body upon a succes- 

 sion of rings, one or two pair to each ring ; the 

 first and sometimes the second make part of the 

 mouth. 



Examples. Julus or round centipede, poly- 

 desmus, scolopendra or flat centipede. 



2. THYSANOURA,/^^^. Wingless. 



They walk upon but six feet ; but they have 

 other particular organs of movement along the 

 sides or at the extremity of the body, giving it 

 somewhat the appearance of being fringed or be- 

 set with bristles. 



Examples. Lepisma, podura. 



8. PARASITA, parasites, crawling upon oilier an- 

 imals- Wingless . 



They have two smooth eyes : a snout enclosing 

 a retractile sucker. 



Examples. Pediculus or louse, ricinus or bird 

 louse. 



4. SUTORIA, suckers. Wingless. The beak 

 consists of 'a sucker enclosed in a cylindric sheath of 

 two articulated pieces 



Example. Pulex or flea. 



5. COLEOPTERA, sheath-winged. Having four 

 wings ; the outer pair (called elytra] being crusta- 

 ceous cases, and the inner pair folded transversely. 



