<b>New Host Record of Blossom Midge, Contarinia maculipennis Felt Cecidomyiidae Diptera in Tamil Nadu, India</b> The blossom midge C. maculipennis, a serious pest in orchids which infests blooms and mainly hampered the cut flower production have been newly found in Tamil Nadu in recent years. Those infesting the flower buds of Dendrobium spp. Orchidaceae was identified, on the basis of morphological key characters and further, the identity of midge specimen was confirmed through molecular techniques with mitochondrial Cytochrome Oxidase subunit I COI gene specific primers, as C. maculipennis. The COI sequence of Contarinia species was closely 100 similarities related with already sequenced C. maculipennis with 678 bp. Dendrobium spp. is newly regarded as one of the host plants of C. maculipennis. Contarinia maculipennis, Dendrobium spp., morphological, molecular 451-455 Issue-5 Volume-2 M. Jayasheelan | L. Allwin | G. Preetha | K. Elanchezhyan