Explain the different insects which belong to non chordate phyla?

Lepisma is also known as silver fish. It is a common domestic pest which occurs in dark, cool and damp areas. It moves swiftly and avoids being exposed to light. It is a wingless soft body insect which is covered with the scales. They have biting type of mouth part. Their compound eyes do not function well. The abdomen is multi segmented and have single multiple segment terminal known as caudal filament. They feed on starch and can destroy books and clothes. Sympetrum is also known as dragon fly. They reside in the vicinity of water and feed on mosquitoes and are known as mosquito hawks. They have good hunter skills and are strong fliers. They copulate in the air and eggs are formed inside the water. The gaseous exchange takes place in the rectum. This is a unique feature of dragon fly. They have biting and chewing type of mouth part. They have two pairs of wings and have modified legs for catching the prey and anchoring. They help to control malaria as they feed on mosquito. Cimex is also known as bed bug. It acts as a parasite and feeds on blood. They are found on mattresses and cots. They cannot fly and can live for many months without food. They also show cannibalism. Their body is red brown and has piercing sucking type mouth parts. They penetrate the host skin and suck the blood. They have wing pads which hide the mesothorax. They act as a vestigial wing and have no hind wings. They have 6 legs. It causes irritation and inflammation and transfers the germs of all important diseases. Vespa is also known as Wasp. It is found in the north India and rests in winter. They live in colonies and are polymorphic. They also have a social life and live in hives. They reside in houses, tress and rocks. They are omnivorous and bear a sting which can cause injury to the human body and cause pain. They are yellow in color and have biting and chewing type mouth parts. The thorax and abdomen are cylindrical and spindle shape respectively. They are joined by pedicel and are trimorphic. Aphis is also known as aphid. They feed on plant and excrete the honey dew. It is sweet in taste and ants feed on it. The female aphid is viviparous. They reproduce by parthenogenesis. They are domesticated by plants and are known as ant cows. They can be with or without wings. They are small and soft and have a pair of honey dew tubes. They arise from the posterior part of abdomen. Beetles are found everywhere and have multiple varieties. They can be herbivorous or carnivorous. They cannot fly and feed on crops. They have stout built and are large sclerotized insects. The head is not fixed and have biting and chewing type mouth parts. There are wing covers which are thick, hard and opaque and are present on fore wings. They are also used to cover hind wings. These are larger than the fore wings and have a membranous covering which do not allow them to fold up. They help to fly and have 6 legs which help in walking. They can be modified and can be used for the other purposes. They are placed in the order coleoptera which is the largest in kingdom animal. They feed on crops and destroy the food grains. They also feed on aphids which are harmful insects.
Butterflies reside on flowers, fruits, nectar and honey. These things are affected by the adult butterflies. The larva butterfly affects the leaves, roots and stems. They are diurnal. There is a cabbage butterfly which resides on the leaves of cabbage. Their larvae are known as caterpillars which have biting mouth parts, six legs in thorax and 10 legs in the abdomen. They also have small size antennae. They are multi colored and are covered by scales. They have body, wing and appendages. The adult butter flies have siphoning type of mouth parts. The maxillae are changed to sectional proboscis. They have knobbed antennae. They have 4 wings which are membranous. When the wings rest they are in a vertical position. They help in cross pollination and being colored they make a good collection for art lovers. They have a destructive effect on crops, gardens and orchards. Locust is of many types. The most common locust is desert and migratory locust. They are the most destructive types of insects. The desert locust resides in the desert and as the conditions change it passes through gregarious phase. The migratory locust occurs in big cities and resides on leaves. They lay eggs underground. They have biting and chewing mouth parts. They have hind legs which are quite powerful. They produce a sound by rubbing each other. Pediculus is also known as human louse. It acts as a parasite in human and feeds on their blood causing irritation. It also carries germs of typhus fever. They have flat body and their color is pale. They have piercing and sucking mouth parts. They also have small size antennae and not fully formed eyes. They have no wings and their leg bears a claw which helps in clinging. Xenopsylla is also known as rat flea. It acts as a parasite on rat and men. It is sangnivorous. It causes bubonic plague by the transmission of bacillus pestis from rat to man. They have bristles all over their body. They have piercing and sucking mouth parts. They have no wings and their legs help in jumping. They bear a claw which helps in clinging. Their abdomen has 10 segments. The 9th segment has sensory pygidium.