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ORISMOLOGY. 
v. MOUTH (Os). 
Trerminat (Terminale). When the mouth termi- 
nates the head. Ex. Coleoptera, &c. 
Prone (Pronum). When the mouth is wholly un- 
der the head. Ex. Truxalis, Proscopia. 
. Perrecr (Perfectum). \ hen the mouth is furnished 
with all the Trophi. Viz. Labrum; Labium; 
Mandibule; Mazille; Mavzillary and Labial 
Palpi; and Tongue. Ex. The Masticating Orders. 
FEEDERS RETRACTED (Trophi retracti). 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. 
FEEDERS RETRACTILE (Trophi retractiles). When, 
in a perfect mouth, the Zrophz can be considerably 
pushed forth or drawn in. Ex. Stenus, Apis, &c. 
. Imeerrect (Imperfectum). When the mouth wants 
any of the Zrophz, or they exist in it only as rudi- 
ments. Ex. The Suctorious Orders. 
. Exasprate (Llabratum). When an imperfect mouth 
has Mandibule, Macilla, Labium, and Mazillary 
Palpi, or what perform their office, but no Labrum. 
Ex. Araneida. 
. Emanpipunate (Emandibulatum). When an im- 
perfect mouth has all the Trophz but the Mand:- 
bule. Ex. Trichoptera Kirby. 
. Breatpate (Bipalpatum). When an imperfect 
mouth has only either Labial or Mavillary Palpi. 
Ex. Tabanus, &c. 
- Expatpare (Expalpatum). When an imperfect 
mouth has no Palpz. Ex. Hemiptera. 
