Three new species and one new record are added to the philopotamid fauna of India from the Indian Himalaya. The newly described species under the genus Chimarra Stephens include Chimarra butticulata sp.n. and C. gangotriensis sp.n. both from Uttarakhand and C. sangtami sp.n. from Nagaland. The record of C. nigra Kimmins (from Sikkim) constitutes the first record of that species from India, although it was previously known from Nepal. It is redescribed here from India as there are minor differences in the male genitalia from previously described species (in original paper of Kimmins only lateral view of the phallus was illustrated and in the redescribed species the ventral view of phallus is illustrated along with the lateral view). The four species belong to two different species groups and one species is unplaced in the species group. These species are distinguishable from each other as well as from the previously known allied species by consistent taxonomic features of the inferior appendages, tergite X, and the phallic apparatus of males. 1. Introduction With more than 800 species known for the world, about 400 species of the genus Chimarra Stephens are recorded from the Oriental Region [1]. The genus is the second largest caddisfly genus in terms of species diversity, second only to Rhyacophila [2] (Rhyacophilidae), and is known from all biogeographical regions except Antarctica [3]. About 2/3rd of the species in the genus Chimarra are restricted to the Oriental and Neotropical Regions and the lowest diversity (less than 3% of the species) is in the Palaearctic Region. The genus Chimarra is divided into 4 subgenera: Chimarra Stephens, Chimarrita Blahnik, Curgia Walker, and Otarrha Blahnik [4]. The last 3 subgenera occur only in the Neotropical Region, whereas subgenus Chimarra occurs worldwide and is especially abundant in tropical regions, being the only subgenus of the subfamily Chimarrinae distributed in India. Most of the oriental species of Chimarra were described in the past 22 years. Malicky [5–18] described 162 species from Nepal, China, Cambodia, Thailand, Indonesia (Ambon, Bali, Irian Jaya, Java, Kalimantan, Lombok, Sulawesi, and Sumatra), Vietnam, Bhutan, Malaysia (Sabah), Pakistan, Philippines, Sri Lanka, and India (Andaman Islands, Great Nicobar Island, and South Andaman Island). In addition to those works coauthored by Malicky and others, in which many new species were described and first national species records made include those of Sun and Malicky [19], Malicky and Chantaramongkol [20–23] and Malicky et al. [24], other works
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