Major differences between Homoptera and Heteroptera.

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Contributor:Dr. Pankaj OudhiaInteractive TableID: 2426
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Major differences between Homoptera and Heteroptera.
Homoptera (Cicadas, Aphids, Scale insects)Heteroptera (bugs)
(1) Many of them are wingless, at least in the female sex or under certain conditions, when wings are present, they are four in number, of a nearly uniform, membranous, or someties somewhat leathry texture, the front pair is longer, the hind pair often wider, they usually stand slopping roof - shaped over the obdomen when at rest. Their tips. They do not overlay much at the tip.Haivng the front pair of wings thickened and quite stiff about the basal half, the distal half abruptely thinner, usually membranous. - When folded back they lie horizontally or flat, over the back and tips of the front pair overlap.Marked diffi. In both wings. F. Wings ar termed hemi-elytra. Their proximal area is well sclereotized. H. wing always membranes are folded beneath the hemielytra at rest.
(2) The labium or beak of the Homoptera attaches to the head near its hinder part. Often seeming to arsise from between the fore legsy which touch the head, sometimes, in sessile forms, the labium is very short, apparantely wanting.The Head or beak of Heteroptera attacts well forward near the ront end of the head and the head is free from the coxae and longer than it is in Homoptera
(3) Pronotum is almost always small and frequently collar - like, except in membracidae where it may assume inceeredibly bizarre and grotesque formsPronotum is always large, forms a greater part of thorax when viewed from above.
(4) Head more or less deflexed, gular region small and membranous.Head porrect, gular region sclereotized.
(5) Base of rostrum extending between anderior coxae.Base of rostrum not touching anterior coxae.
(6) Trochantins largeSmall
(7) Tarsi 1 to 3 segmented3 Seg.
(8) Metamorphosis incomplete, sometime complete in male, more rarely in femaleIncomplete always.

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