ORISMOLOGY. 317 



Mandibula ; Maxilla;; Maxillary and Labial 

 Palpi; and Tongue. Ex. The Masticating Orders. 



a. FEEDERS RETRACTED (Trophi rctracti}. When, in 



a perfect mouth, the Trophi are not capable of be- 

 ing much pushed out or drawn in. Ex. Most Co- 

 leoptera, Orthoptera> &c. 



b. FEEDERS RETRACTILE (Trophi retractiles). When, 



in a perfect mouth, the Trophi can be considerably 

 pushed forth or drawn in. Ex. Stenus, Apis, &c. 



4. IMPERFECT (Imperfectum). When the mouth wants 



any of the Trophi, or they exist in it only as rudi- 

 ments. Ex. The Suctorious Orders. 



5. ELABRATE (Eldbratnm). When an imperfect mouth 



has Mandibulce, Maxillce, Labium, and Maxillary 

 Palpi, or what perform their office, but no Labrum. 

 Ex. Araneidea. 



6. EMANDIBULATE (Emandibulatum). When an im- 



perfect mouth has all the Trophi but the Mandi- 

 bidce. Ex. Trichoptera. 



7. BIPALPATE ( Bipalpatum ). When an imperfect 



mouth has only either Labial or Maxillary Palpi. 

 Ex. Tabanus, &c. 



8. EXPALPATE (Expalpatum). When an imperfect 



mouth has no Palpi. Ex. Hemiptera. 



9. STOMAPODOUS (Stomapodum}. When the Legs and 



Sternum act the part of Maxill<z, Labium, and 

 Palpi. Ex. Araneidea^ Scolopendra, &c. 



a. UPPER LIP (Labrum). 



1. WHISKERED (Mystacinum). When the upper lip 

 is furnished with whiskers (Mystax}., or bearded. 

 Ex. Creophiliis Mrtus. PLATE XXVI. FIG. 30. 



