Contents: 1. Introduction. 2. Review of literature on Chaetotaxy in the order Lepidoptera with emphasis on Butterflies. 3. Material and methods. 4. Observations on the Chaetotaxy of various species. i. Castalius rosimon (Fabricius). ii. Euchrysops cnejus (Fabricius). iii. Vanessa (Aglais) cashmiriensis Kollar. iv. Vanessa (Vanessa) Indica (Herbst). v. Vanessa (Cynthia) cardui (Linnaeus). vi. Hypolimnas bolina (Linnaeus). vii. Junonia almana Linnaeus. viii. Phalanta phalantha (Drury). ix. Acraea issoria (Hubner). x. Acraea terpsicore (Linnaeus). xi. Ypthima inica (Hewitson). xii. Euploea core (Cramer). xiii. Colotis amata (Fabricius). xiv. Pontia daplidice (Linnaeus). xv. Cepora nerissa (Fabricius). 5. Discussion. 6. Key to the presently studied families of the superfamily Papilionoidea. 7. References. Abbreviations.