Mouth parts of insects The mouth parts of

Mouth parts of insects

The mouth parts of insects are variously modified in different insect groups to suit their specific mode of feeding The various mouth parts are A labrun An epipharynx A pair of mandiblies A pair of Ist maxillae second maxillae or labium A hypopharynx

Chewing or Mandibulate type of mouth parts of grass hopper • Latrum broad retangular plate • Mandibles are hard horny and with toothed inner margins for chewing food • A pair of maxilla used in manipulating food as it enters mouth • Broad median labium serve to hold the food which is worked on by mandibles and maxillae • Hypopharynx present in preoral cavity formed by labrum above and labium below

Chewing and Lapping mouth parts in Honey bee • Mandibles and labrum are of chewing type and are used for grasping prey or molding wax • Maxillae without lacinia, Galea are long blade like • Labium with reduced Paraglossa, elonogated Glossa to from channeled organ. Elongated labial palps present • Galea and labial palps when drawn closer from long hollow proboscis

Siphoning type of mouth parts in Butterflies • Labrm narrow band like • Mandibles reduced • Maxillary palps and lacinia vestigial Galea long deeply grooved to from proboscis • Labium reduced, bearing 3 joined labial plap • Hypopharynx and Salivary channel absent

Piercing and Sucking Type of Mouth parts in Mosquito • Labrum, mandible and maxillae are slender and long and fit together to from a delicate hollow needle. • Labium forms a stout sheath that holds this needle rigid. • The whole structure is called beak.

Sponging type of mouthparts in house fly • Mandibles and maxillae are non functional • Proboscis consists of Rostrum , haustellum and sucker. Hustellum has a groove in which lie Labrum – Epipharynx and Hypopharynx. Which form a food channel. • suker consists of two lobes labella which has on lower surface numerous transverse grooves Pseudotrachea.