The paper deals with a comprehensive account of the neuropteran fauna of North-East India. The systematic account of the neuropteran fauna has brought to light the existence of 128 species in 69 genera and 11 families under the two suborders Megaloptera and Planipennia. Out of these 128 species, material of 88 species could be examined and the rest have been reviewed from the literature as even with the best effort, it was not possible to have a glimpse of the species.
Amongst a total of 88 species examined, Spilosmylus darjeelingensis has been described as new to science and females of Parosmylus belaae Ghosh (Fam. Osmylidae), Hemerobius harmandinus Navas, Hemerobius humulinus Linnaeus and Neuronema nepalensis Nakahara (Fam. Hemerobiidae); Retipennia hasegawai (Nakahara) [Fam. Chrysopidae]; Hagenomyia nigrinus (Esben-Petersen) and Indoclystus singularis (Westwood) [Fam. Myrmeleontidae] and Inocellia crassicornis (Schummel) [Fam. Inocellidae] have been recorded for the first time from India. Besides, Hagenomyia eurystictus (Gerstaecker), Hagenomyia marginicollis (Gerstaecker), Hagenomyia nigrinus (Esben-Petersen) from the examined material and Distoleon bivittatum Banks [Fam. Myrmeleontidae] from literature have been newly combined. For 41 species and subspecies, new localities have been added to the previously recorded localities. Parosmylus belae Ghosh (♀), Thyridosmylus perspicillaris fenestratus Kimmins (Fam. Osmylidae), Indoclystus singularis (Westwood) [Fam. Myrmeleontidae] and Inocellia crassicornis (Schummel) [Fam. Inocellidae] have been redescribed.
In addition to the systematic account, external morphology and terminology of Neuroptera, historical resume, topography, climate and vegetation of North-East India, classification, economic importance of the group, geographical distribution and seasonal occurrence of Neuroptera have been included. Running keys to all the taxa examined, illustrations pertaining to the majority of species and relevant references have also been provided.