Division of Nematology, Indian Agricultural Research Institute, New Delhi-110 012.
* Part of the Ph.D. Thesis, submitted by the senior author, to the post-Graduate School, IARI, New Delhi.
Three new species of the genus Lelenchus, namely, L. aunulatus sp. n., L. crassus sp. n. and L. tenuis sp. n. are described and illustrated. L. aunulatus sp. n. comes close to L. cynodontus Husain & Khan, 1967; L. mirus Husain & Khan, 1967, and L. microdorus Chawla et al., 1969; but differs from them in having longer stylet and two pairs of cephalids on neck. L. crassuS sp. n. is closest to L. microdorus Chawla et al., 1969, but differs from it mainly in having more posteriorly located vulva. L. tenius sp. n. comes close to L. cynodontus Husain & Khan, 1967, L. minutus (Cobb, 1893) Andrassy, 1954, and L. annulatus sp. n.; but differs from them in having relatively low and rounded head, two pairs of cephalids and excretory pore located anterior to nerve ring.
