ORISMOLOGY. 31. 
ii. INSERTION. 
1. Retracted (Rctractum). When the head is wholly 
withdrawn within the trunk. — Ex. Parnus. 
2. Intruded (Intrusion). When the head is nearly 
withdrawn within the trunk. — Ex. Melasis. 
?>. Inserted (Inscrtum). When the head is partly 
withdrawn within the trunk. — Ex. Buprestis. 
4. Exserted (Exsertum). When the head is quite 
disengaged from the trunk. — Ex. Tenebrio, Blaps. 
5. Amplected (Amplexum). When the head is re- 
ceived into a sinus of the thorax. — Ex. Mister. 
6'. Recondite (Reconditum). When the head is wholly 
covered and sheltered by the shield of the thorax. 
— Ex. Cassida, Lampyris. 
7. Semi recondite (Semireconditum). When the head 
is half covered by the shield of the thorax. — Ex. 
Silpha, Cyphon. 
8. Retractile (Retractile). When an insect can at 
pleasure exsert its head, or withdraw it within the 
trunk. — Ex. Histcr, Larva of Lampyris. 
9. Versatile (Versatile). When the head can turn 
nearly round. — Ex. Hymenoptera, Diptcra. , 
10. Pedunculate (Pedunculatum). When the head is 
constricted behind into a distinct neck. — Ex. Apo- 
derns Coryli, &c. 
11. Sessile (Sessile). When the head does not move 
in the socket of the trunk, but is attached to it by 
a kind of ligament. — Ex. Hymenoptera, Diptcra. 
iii. TERMINATION. 
1. CLYrEATE (Clypcatum). When the Nasus, Gencr, 
