optic lobes. The ocelli of cricket are called dorsal ocelli, which consists of

 cornea, corneagenous cells, and the retina etc. The ocelli of insects are to impr

ove the perception of visual stimuli excited about the level of the excitation

site. The compound eye of cricket is the most important organ of visual system.

 It is composed of cornea，crystalline conel, rhabdom, retinula cell and basement

membrane. It is a center of photo and visual transduction cascade reaction. Opti

c lobe, the center of vision system, is constituted by lamina, medulla and

lobula.