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5. 
10. 
ORISMOLOGY. 
Inritexen (Inflewum). When the head forms in- 
wards an acute angle with the trunk. Ex. Blatta. 
Puare [I]. Fie. 3. 
Turrerep (Turritum). When the head is pro- 
ducted into a kind of columnar recurved turret or 
rostrum, in the sides of which, towards the end, 
the eyes are fixed. Ex. Trucalis. 
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/ 
ii. INSERTION. 
. Rerractep (Retractum). When the head is wholly 
withdrawn within the trunk. Ex. Parnus. 
IntrupED (Intruswm). When the head is nearly 
withdrawn within the trunk. Ex. Melasis. 
InsertED (Insertum). When the head is partly 
withdrawn within the trunk. Ex. Buprestis. 
ExsErTED (Zivsertum). When the head is quite 
disengaged from the trunk. Ex. Tenebrio, Blaps. 
AMPLECTED (Amplexum). When the head is re- 
ceived into a sinus of the thorax. Ex. Hister. 
REcONDITE (feconditum). When the head is wholly 
covered and sheltered by the shield of the thorax. 
Ex. Cassida, Lampyris. 
. SEMIRECONDITE (Semireconditum). When the head 
is half covered by the shield of the thorax. Ex. 
Silpha, Cyphon. 
ReEtractiLe (fetractile). When an insect can at 
pleasure exsert its head, or withdraw it within the 
trunk. Ex. Hister, Larva of Lampyris. 
. VERSATILE (Versatile). When the head can turn 
nearly round. Ex. Hymenoptera, Diptera. 
PEDUNCULATE (Pedunculatum). When the head is 
