Fundamentals of Entomology

Types of antennae

Definition of ‘Entomology’ and importance of insects

1. Setaceous: (Bristle like) Size of the segments decreases from base to apex. e.g. Leafhopper, Dragonfly, Damselfly.
2. Filiform: (Thread like) Segments are usually cylindrical. Thickness of segments remains same throughout. e.g. Grasshopper.
3. Moniliform: (Beaded) Segments are either globular or spherical with prominent constriction in between e.g. Termite.
4. Serrate: (Saw like) Segments have short triangular projections on one side. e.g. Longicorn bettle 
5. Unipectinate: (Comb like) Segments with long slender processes on one side e.g. Sawfly
6. Bipectinate: (Double comb like) Segments with long slender lateral processes on both the sides e.g. Silkworm moth
7. Clavate: (Clubbed) Antenna enlarges gradually towards the tip. e.g. Blister beetle
8. Capitate: (Knobbed) Terminal segments become enlarged suddenly e.g. butterfly
9. Lamellate: (Plate like) Antennal tip is expanded laterally on one side to form flat plates e.g. lamellicorn beetle 
10. Aristate: The terminal segment is enlarged. It bears a conspicuous dorsal bristle called arista e.g. House fly
11. Stylate: Terminal segment bear a style like process eg. Horse fly, Robber fly. 
12. Plumose: (Feathery) Segments with long whorls of hairs e.g. male mosquito
13. Pilose: (Hairy) Antenna is less feathery with few hairs at the junction of flagellomeres. e.g. Female mosquito.
14. Geniculate: (Elbowed) Scape is long remaining segments are small and are arranged at an angle to the first resembling an elbow joint. e.g. Ant, weevil and honey bee.