**Kaushal Kumar, *S.K.Jain and *Abhay Kumar
**Centre For Medical Entomology and Vector Management , National Centre For Diseases Control, 22, Sham Nath Marg, Delhi 110054 (India).
*Centre for Medical Entomology and Vector Management, National Centre For Diseases Control, 22, Sham Nath Marg, Delhi 110054 (India).