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Caterpillar #3 (O. postica) (36)
jcoowanitwong Gold Star Critiquer/Gold Note Writer [C: 1679 W: 0 N: 3120] (13754)
Caterpillar (Stalk-eating caterpillar)of Tussock Moth.

Phylum: Arthropoda - Arthropods
Superclass: Hexapoda - Hexapods
Class: Insecta - Insects
Subclass: Pterygota - Winged Insects
Order: Lepidoptera - Butterflies and Moths
No Taxon Moths
Superfamily: Noctuoidea
Family: Lymantriidae - Tussock Moths
Tribe: Orgyiini
Genus: Orgyia
Species: Orgyia postica
Thai common name: หนอนบุ้งปกเหลือง

A caterpillar is the larval form of a lepidopteran (a member of the insect order comprised of butterflies and moths).

Most caterpillars have long, tubular, portioned bodies. They have three pairs of true legs on the three thoracic segments, up to four pairs of prolegs on the middle segments of the abdomen, and often a single pair of prolegs on the last abdominal segment. There are ten abdominal segments.

Like all insects, caterpillars breathe through a series of small openings along the sides of their thorax and abdomen called spiracles. These branch into the body cavity into a network of tracheae.

Caterpillars have 4,000 muscles (the human being has only 629!). They move through contraction of the muscles in the rear segments pushing the blood forward into the front segments elongating the torso. The average caterpillar has 248 muscles in the head segment alone.

Caterpillars do not have good vision. They have a series of six tiny eyelets or 'stemmata' on each side of the lower portion of their head. These can probably form well focused, but poorly resolved images. They move their heads from side to side probably as a means of judging distance of objects, particularly plants. They rely on their short antennae to help them locate food.

Caterpillars have rightly been called eating machines. They eat leaves voraciously, shed their skins generally four or five times, and eventually pupate into an adult form.

With tip from our good friend batu (Peter Roos). More information on this caterpillar can be added.

Lymantriidae or Liparidae is a family of moths

The larvae are hairy, often with hairs packed in tufts, and in many species the hairs break off very easily and are extremely irritating to the skin (especially members of the genus Euproctis; Schaefer, 1989). This highly effective defence serves the moth throughout its life cycle as the hairs are incorporated into the cocoon, from where they are collected and stored by the emerging adult female at the tip of the abdomen and used to camouflage and protect the eggs as they are laid. In others, the eggs are covered by a froth that soon hardens, or are camouflaged by material the female collects and sticks to them (Schaefer, 1989). In the larvae of some species, hairs are gathered in dense tufts along the back and this gives them the common name of tussocks or tussock moths.

From Wikipedia
http://bugguide.net/node/view/335/tree

I posted side view of this caterpillar in workshop.
Thanks for visiting.

Altered Image #1

jcoowanitwong Gold Star Critiquer/Gold Note Writer [C: 1679 W: 0 N: 3120] (13754)
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Edited by:jcoowanitwong Gold Star Critiquer/Gold Note Writer [C: 1679 W: 0 N: 3120] (13754)

To show true legs and prolegs.