Smithsonian Report, 1917. — Safford. 



Plate 41. 



Scale Insects, or Coccidae, Margarodes formicarum. Called Ground-Pearls 

 from their resemblance to opalescent beads of gold. 



Collected alive in black soil in fissure o£ oolitic limestone near Park Lodge by C. E. Hosier. Natural size. 



