Mouth according to feed habit
- Mandibulate ( Chewing type): Grasshopper, Cockroach
- Haustellate ( Sucking type): Aphid, Mosquitoes, Cicada.
Parts of Antennae
- All insects except proturan possess a pair of antennae.
- Used as air funnel for respiration in some water beetles.
- Consists of following parts:
a) Scape: Basal segment bearing a notch.
b) Pedicel: Second globular segment
c) Flagellum: each segment called ‘flagellomere’ . First segment called ‘ meriston’.
- In male mosquito, antennae are used for hearing purpose.
Types of antennae
a. Filiform ( Thread like):
- Uniform and reduced to distal end.
- Eg: Grasshopper
b. Moniliform:
- More or less globose and constriction occurs between the segment.
- Eg: Termites.
c. Serrate (saw-like):
- Segments are more or less triangular projecting in one direction.
- Eg: Click beetles, Mango stem borer.
d. Clavate ( Club-like):
- Segment enlarge towards tip and last segment is almost triangular in shape.
- Eg: Butterflies
e. Capitate ( Knob-like):
- Last 2-3 segment enlarge abruptly forming a knob like structure.
- Eg: Sap bee.
f. Setaceous ( bristle like):
- Each segment becomes smaller and smaller ending to a point.
- Eg: Cockroaches.
g. Pectinate (Comb like):
- Segment having long projection on one side and only in one direction forming a comb-like structure.
- Eg: Fire colored beetle.
h. Bipectinate ( Feather like):
- Eg: Silk worm
I. Flabellate ( Cobra like):
- Eg: Cedar beetle
j. Aristate ( Bearing arista):
- 3 segments ; last segment is longer and bears a bristle like structure called arista.
- Eg: Housefly
k. Plumose:
- Segment contain bunch of hairs on each joint.
- Eg: Male mosquito
l. Lamellate ( Leaf-like):
- Eg: Dung beetle
m. Geniculate ( Elbow-like):
- Eg: Ant, weevils