A brief description of mouth parts of insects are shown in this ppt.Hope this may help you

1. Presented by: Arfa Ahmed Bora
Roll no :182 ( 2nd Semester)

2. CONTENT
• Introduction
• Type of mouth parts
• Biting and Chewing type
• Pierching and Sucking type
• Sponging type
• Siphoning type
• Conclusion
• Reference

3. INTRODUCTION
• The mouth parts of insects therefore grouped into two main categories – chewing or
mandibulate type and Sucking or suctorial type.
• Basically include mandibles ,first maxillae and second maxillae.
• In chewing type mandibles are well developed and maxillae are simple like
cockroach, grasshopper etc.
• In suctorial type the mandibles are vestigial ,eg:- houseful, honey bees etc.

4. TYPES OF MOUTH PARTS
1 .Biting and chewing type-
• This type of mouth parts are supposed to be most primitive type.
• It consists of labrum forming upper lip, mandibles,first maxillae, labium,
( second maxillae) forming lower lip, hypopharynx, epipharynx.
• The labrum is rectangular flap like bilobed structure.
• The mandibles help to musculate the food.
• The first maxillae help in holding the food .
• The second maxillae help to push the musculated food into the mouth.
• The hypopharynx is single tongue like process which salivary ducts open.
• The epipharynx bears taste bud.
• This type of mouth parts are found in cockroach, grasshopper, beetles etc.

5. 2. Chewing and lapping type-
• Occur in honey bees and bumbles bee.
• Consist of long tongue, formed of glossae of the labium ending in a
spoon shaped labellum or flabellum.
• Galea of the maxillae from blade like structure and maxillary palps
are very small.
• A temporary food channel is formed by the proboscis,galea and labial
palps fitting together .
• Labrum and mandibles acts for chewing the food.

6. 3. Pierching and sucking type-
• Mouth parts of insect which feed on fluids modified in various type of tube
through which liquid can be drawn and saliva can be injected.
• Mandibles and maxillae resemble to fine needles meant for pierching the
skin or plant tissue .
• Labium forms the hollow grooved channel which encloses these needle.
• Hypopharynx which present is hollow , and needle like through which it
forms the saliva.
• Eg:- mosquito, bugs etc.

7. 4. Sponging type-
• Found in housefly and some other flies to suck Other liquefied food.
• These flies are lack the cutting weapons of the insects that chew the
food.
• Mandibles are absent while the maxillae are represented by two
maxillary palps.
• Labium is greatly modified to form proboscis which divide into three
parts – rostrum, haustellum, labellum.

8. 5. Siphoning type-
• Butterfly and moths are adapted for feeding on nectar like the bees.
• But in their mouth part the maxillae form the main proboscis and not
labium.
• Mandibles and labium are much reduced ,the maxillary palps are
rudimentary ,and labium forms a triangular plate bearing labial
palps.
• Galea are must elongated and coupled.
• When not in use proboscis is coiled into position beneath the head.
• When insects wants to feed it become uncoiled to reach the nectary.

9. CONCLUSION
The mouth parts of insects are the structure surrounding the mouth
that are involved in the mechanism of feeding and processing and
manipulating the food so that it can be ingested.

10. REFERENCE
• https://en.m.wikipedia.org/wiki/Insect_mouthparts
• https://study.com/academy/lesson/insect-mouth-parts-types-diagram.html

11. ~THANK YOU~