Insect or mosquito larval tray for insectary. These trays are of light brown color with length 14 inches x width 11 inches x depth 7 inches. With light brown color, dark mosquito larvae are clearly visible for easy working with larvae or pupae. In addition, these color coded trays are, in combination with other larval trays available with us, could be used to rear different kinds of isolates in insectary. Each color coded tray can be assigned to particular species or isolate so it could easily be measured available mosquitoes in the laboraotry.