This document discusses the structure and modification of insect legs. It notes that all insects have three pairs of legs, which gives them the name hexapods. The basic structure of an insect leg consists of five segments: the coxa, trochanter, femur, tibia, and tarsus. The document describes each segment and provides examples of how legs are modified for different purposes, such as cursorial, ambulatory, saltatorial, fossorial, raptorial, and others.

1. Insects legs and their modification
By :- Arvind yadav .
ID - 721 .
Degree program :-
Bsc.(hons).horticulture
Batch :-2017.
Banda University Of Agriculture And
Technology , Banda
Email :-Buatarvind721@gmail.com

2. Insect legs
All the three thoracic segments of an insect
possess a pair of legs as locomotory organs
giving the name hexapods and the class
insecta as hexapoda.
Insect leg mainly consists of five parts :-
1. Coxa
2. Trochanter
3. Femur
4. Tibia
5. Tarsus.

3. Structure of leg:-
 Coxa:- It is the functional basal segment and it is rigidly
fixed to thorax or weakly articulated.
 Trochanter :-It is very small and the second segment. It
is articulated with coxa and more or less fixed to femur.
 Femur :- It is the largest, strongest segment and is
articulated with the tibia.
 Tibia :- It is equal or more than the length of the femur,
articulated with tarsus.
 Tarsus :- it is the largest segment of the leg and usually
devided into sub segments tarsomeres. The number of
tarsomeres vary from 1-5 and are movable one on the
other. Among the 5 segments, 1st segment is large, big or
broad in size known as basitarsus.

5.  Type of leg Example
 Cursorial Blister, Beetle, wasp
 Ambulatory Cockroach
 Saltatorial Grasshopper
 Fossorial Molecrickets,dung
rollers
 Raptorial Preying mantids
 Antennal cleaning Honey bee
legs

6. Leg type Example
 Natatorial Waterbeetle, waterbugs
 Scansorial Head louse
 Prehensile Dragon flies
 Antennal Cleaning legs Honey bee
 Wax pick type Honey bee
 Pollen basket and brush type Honey bee