Granary Weevil Sitophilus granarious (L) 1/10 - 3/16 inch long. Develops inside kernels, has snout or proboscis. Adult color black to brown.  DOES NOT FLY.   No wings under elytia, oval pits on thorax. Life Cycle of 25 days @ 30 degrees Celsius Maximum population growth rate per month:  25 times