1. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
1. Silverfish/Lepismatidae/
Thysanura
Cerci
Median
caudal filament
Fig. Silverfish
 Body covered with silvary scales.
 Last abdominal segment bears a pair of cerci and a median caudal
filament.
Antenna long and filiform.
Filiform antenna

2. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
2. Dragonfly/Aeshnidae/
Odonata Eye contagious
Fig. Dragonfly
 Body stout and robust. Wings dissimilar, i.e. the base of the hind wings
are broader than the base of the fore wings.
 Wings held horizontally when at rest.
 Compound eyes larger and contagious.
Stigma present at apex of the each wing.
Base of the hind wing
broader than the base
of the front wing
Wings dissimilar
Stigma present

3. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
3. Damselfly/Coenagrionidae/
Odonata
 Body slender.
 Both wings similar.
 Compound eyes larger but separated.
 Stigma present on each wing.
Eyes separate
Fig. Damselfly
Both wings similar
Body slender
Stigma present

4. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
4. Short horned grasshopper/Acrididae/
Orthoptera
Hind leg jumping type
Fig. Short horned grasshopper
 Body stout and robust. Wings dissimilar, i.e. the base of the hind wings
are broader than the base of the fore wings.
 Wings held horizontally when at rest.
 Compound eyes larger and contagious.
Stigma present at apex of the each wing.
Wings: tegmina
Filliform antenna

5. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
5. Long horned grasshopper/Tettigoniidae/
Orthoptera
Fig. Long horned grasshopper
Antenna longer than body and and filiform.
Ovipositor sharp, flattened and blade like structure.
Hind leg jumping type and tarsi 4 segmented.
Ovipositor blade like
Antenna longer
Than the body
Wings tegmina

6. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
6. Field Cricket/Gryllidae/
Orthoptera
Fig. Field cricket
Body large dull, usually pale, brownish or black in color.
Ovipositor long needle like.
A pair of unsegmented cerci present.
Fore wings modified into tegmina.
Hind leg jumping type.
Ovipositor needle like
Dull, pale
colored body
Wings tegmina

7. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
7. Mole Cricket/Gryllotalpidae/
Orthoptera
Fig. Mole cricket
Robust body.
Ovipositor short and vestigial.
Front leg greatly enlarged and modified for digging.
A pair of long unsegmented cerci present.
Fore wings modified into tegmina
Ovipositor vestigial
Wings tegmina
Front leg digging type
Robust body

8. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
8. Earwig/Forficulidae/
Dermaptera
Cerci modified into
Forcep like structure
Fig. Earwig
Cerci modified into forcep like structure.
Fore wings short, modified into tegmina and hind wings semi circular and folded
beneath the tegmina.
Antenna short and filiform.
Tarsi 3 segmented.
Tegmina short
Filliform antenna

9. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
9. Cockroach/Blattidae/
Dictyoptera
Body oval
Fig. Cockroach
Body oval, flattened, head partly or completely covered by the shield like pronotum.
Antenna longer than the body filiform.
Cursorial or walking and running type leg.
Fore wings modified into tegmina, hind wings membranous.
Mandibulate mouthparts, chewing type
Shield shaped pronotum
Filliform antenna

10. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
10. Preying mantid/Mantidae/
Dictyoptera
Pro thorax greatly
elongated
Fig. Preying mantid
Head movable
Prothorax greatly elongated.
Fore leg raptorial type adapted for grasping prey.
Fore leg raptorial
Or grasping type
Head movable

11. Sylhet Agricultural
University
Department
of
EntomologyChandra Kanta Dash (Assistant Professor)
11. Termite/Termitidae/
Isoptera
Broad junction between
Thorax and abodomen
Fig. Termite
Broad junction between thorax and abdomen
Antenna moniliform, multisegmented.
Workers with larger head and prominent mandible.
Winged or wingless; winged formed with two pair of wings similar in size and shape,
held flat over the adomen at rest.
Mouthparts chewing type.
Antenna moniliform
Prominent mandible
in worker
Wings similar
when present