author(s)
Dhananjoy Chingangbam Singh, Leishangthem Sanathoi Singh, MD Mansoor Ahmed, RK Tombisana and Takhellambam Ramananda Singh

abstract
The exploration of chironomids from Manipur was a successful one. Many of them are abundantly found in the every aquatic habitats and it is not easy to identify. The larval identification was also very difficult as many of them are identical in species of different genera. Here in the present study we are reporting Chironomus javanus Kieffer. It was collected from two habitats-sewage drainage and a lake. Some larvae were fixed in fixative to study the salivary polytene chromosomes with acetocarmine-squashed method. There was no differences in the morphology and karyotypes from two spots. The characteristics that separate out this from rest of other species is in having 7 (seven) teeth in the premandible besides well separated and while the adults are yellow-green in colour. The karyotype consists of 8 chromosomes with pseudo-thummi combination. There is much to be study to understand the underlying mechanism to understand the speciation in the genera. The chironomids of Manipur are not fully explored and many are yet to be named and described. The morphological features as well as the cytology of the C. javanus of Manipur is quite different from the rest of the world and much is needed to study.