Insects, evolved about 480 million years ago, are the dominant species in the today’s biotic community and wide spread in all the habitats of our mother Earth. These minute creatures are an integral and complex part of the terrestrial and fresh water ecosystem with which the future of human is inextricably linked. Insects are always on duty to fulfil our demands round the clock and act as tiny machines which are driving the instinct of our ecosystem. Out of the total 15, 52, 319 described animal species, the insects (10, 20, 007) account for 66% of total animals (Zhang, 2011). However, this is only about 20% of the total expected 5 million insect species (Monastersky 2014, Nature vol.516). So, due to the importance of insects for mankind and a wide gap between the discovered and expected number of species, our highest priority should be to inventorize and discover the remaining 80% of the insect fauna for the benefit of humans. Furthermore, it is high time to undertake this responsibility because as per recent studies, species are disappearing up to about 100 times faster than the normal rate and the pressure on our biodiversity is accelerating day by day.
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